23 Jul is in July.
1486 Marriage of Henry VII and Elizabeth York
1554 Marriage of Queen Mary with Philip II of Spain
1596 Death of Henry Carey 1st Baron Hunsdon
On 23 Jul 1245 Thomas Berkeley 6th and 1st Baron Berkeley was born to Maurice Berkeley 5th Baron Berkeley (age 27) and Isabella Plantagenet Baroness Berkeley at Berkeley Castle [Map]. He a great grandson of King John "Lackland" of England.
On 23 Jul 1321 Thomas Berkeley 6th and 1st Baron Berkeley (age 76) died at St Augustine's Abbey, Bristol [Map]. His son Maurice Berkeley 7th and 2nd Baron Berkeley (age 50) succeeded 7th Baron Berkeley Feudal, 2nd Baron Berkeley 1C 1295. Isabella Clare Baroness Berkeley (age 59) by marriage Baroness Berkeley Feudal, Baroness Berkeley.
On 23 Jul 1338 Peter IV King Aragon (age 18) and Maria Évreux Queen Consort Aragon (age 9) were married. Maria Évreux Queen Consort Aragon by marriage Queen Consort Aragon. She the daughter of Philip "Noble" III King Navarre (age 32) and Joan Capet II Queen Navarre (age 26). He the son of Alfonso IV King Aragon and Teresa Enteca Queen Consort Aragon. They were fourth cousins. He a great x 5 grandson of King Henry "Curtmantle" II of England. She a great x 3 granddaughter of King Henry III of England. 
On 23 Jul 1339 Louis Valois Anjou I Duke Anjou was born to King John "The Good" II of France (age 20) and Bonne Luxemburg Queen Consort France (age 24) at Château de Vincennes, Vincennes.
On 23 Jul 1392 William Beauchamp 1st Baron Bergavenny (age 49) and Joan Fitzalan Baroness Bergavenny were married. Joan Fitzalan Baroness Bergavenny by marriage Baroness Bergavenny. She the daughter of Richard Fitzalan 9th Earl Surrey 11th Earl Arundel (age 46) and Elizabeth Bohun Countess Arundel and Surrey. He the son of Thomas Beauchamp 11th Earl Warwick and Katherine Mortimer Countess Warwick. They were second cousin twice removed. He a great x 5 grandson of King John "Lackland" of England. She a great x 2 granddaughter of King Edward "Longshanks" I of England. 
On 23 Jul 1476 William Lovell Baron Marshal, Baron Morley (age 49) died. His son Henry Lovell 9th Baron Marshal 8th Baron Morley succeeded 9th Baron Marshal, 8th Baron Morley. Elizabeth Pole Baroness Marshal Baroness Morley (age 8) by marriage Baroness Marshal, Baroness Morley.
Vatican Regesta Vol. DCLXXXV Secretarum Tomus IV 2 Innocent VIII. 10 Kal. Aug. Decree, at the petition of king Henry (age 29) and queen Elizabeth (age 20), that a notarial copy of the process before James, bishop of Imola, Apostolic Nuncio with the power of a legate de latere, in regard to the dispensation granted by him to them to contract marriage, notwithstanding the impediment arising from their being related in the double fourth degree of kindred, shall have the same credence as the original letters of the said bishop. The Pope (age 54) exemplifies the said letters and process as follows:
Public instrument, setting forth that in the year of the Incarnation 1486, after the computation of the English church, the 4th indiction, anno 2 Innocent VIII [16 Jan 1486], in the chapel of St. Mary [the Virgin] on the east side of the cathedral church of St. Paul, London [Map], before James, bishop of Imola, apostolic legate to England and Scotland, in presence of the below-written notaries public, appointed by the said bishop as scribes in the below-written matter of dispensation, and witnesses below-named, there appeared in person Master Robert Morton (age 51), Archdeacon of Winchester, and John de Giglis, I.U.D., as proctors of king Henry (age 29), and Richard Hill, dean of the chapel of the household of the said king, and David William, doctor of decrees, dean of St. Mary's Arches, London, as proctors of the lady Elizabeth (age 20), eldest daughter of the late king Edward IV, who produced their mandates of procuration and presented to the said legate a schedule of petition on behalf of the said king and lady, praying him to dispense them to marry, notwithstanding the impediment of their relationship in the fourth and fourth degrees of kindred, as was specified by the said Master Robert Morton (age 51).
The said instrument exemplifies the said procurations and schedule, as follows:
(i) A public instrument, setting forth that in the year of the Incarnation, etc., 1486, the 4th indiction, anno 2 Innocent VIII, January 14, in a certain great chamber within the palace royal at Westminster, before Thomas, archbishop of York (age 62) and legate of the apostolic see, John, bishop of Worcester (age 56), chancellor of England, and Jasper duke of Bedford (age 54), and many other nobles and magnates, in the presence of me, Richard Spencer, notary public below-written, the said king (age 29), present in person, appointed Masters John de Giglis, I.U.D., and Robert Morton (age 51), master or keeper of the rolls of the chancery of the said king, as his proctors to appear before the said bishop and legate (who, as is said, has faculty from the apostolic see to dispense a certain number of persons related in the fourth and fourth degrees of kindred and affinity to contract marriage), and to request him to exhibit, etc., the said letters, and execute them in accordance with the desire of the said king, etc. Of all which things, done on the above date and in the above place, in the presence of the above-named witnesses and of Richard Spencer, clerk, of the diocese of Lincoln, notary public by apostolic and imperial authorities, registrar-principal of the court of Canterbury, and keeper of the registers of the same court, the said notary has made the present public instrument, and, being otherwise engaged, has caused it to be written by another, and has published and drawn it up in this public form, and has signed it with his wonted sign and name;.
(ii) A like public instrument, setting forth that on the same date as in the preceding, and in a certain chamber within the royal palace of Westminster, before John, bishop of Worcester, chancellor of England (age 56), John lord de Wellys (age 36), Master William Smyth, dean of the chapel royal of Wymbourn in the diocese of Salisbury, and other witnesses, in the presence of the above notary, Richard Spencer, the above lady Elizabeth (age 20), present in person, appointed Masters Richard Hill, dean of the chapel of the king's household, and David William, doctor of decrees, dean of St. Mary's Arches, London, and commissary-general of the official of the court of Canterbury and president of the said court, in the absence of the said official, as her proctors to appear, etc., as in the preceding. Of all which things, done on the above date and in the above place, in the presence of the abovenamed witnesses and of … Richard Spencer, clerk, etc., as above, the said notary has made, written, subscribed, published, and drawn up in this public form the present public instrument, and has signed it with his wonted sign and name;.
(iii) The petition to James, bishop of Imola, apostolic legate to England and Scotland, on behalf of the most serene prince and lord, the lord Henry (age 29), by the grace of God king of England and France and lord of Ireland, of the one part, and of the most illustrious (clarissime) lady, the lady Elizabeth (age 20), eldest legitimate and natural daughter of the late Edward, sometime king of England and France and lord of Ireland, of the other part, setting forth that whereas the said king Henry has by God's providence won his realm of England, and is in peaceful possession thereof, and has been asked by all the lords of his realm, both spiritual and temporal, and also by the general council of the said realm, called Parliament, to take the said lady Elizabeth to wife, he, wishing to accede to the just petitions of his subjects, desires to take the said lady to wife, but cannot do so without dispensation, inasmuch as they are related in the fourth and fourth degrees of kindred, wherefore petition is made on their behalf to the said legate to grant them dispensation by his apostolic authority to contract marriage and remain therein, notwithstanding the said impediment of kindred, and to decree the offspring to be born thereof legitimate.
After 23 Jul 1505 Robert Radclyffe 1st Earl of Sussex (age 22) and Elizabeth Stafford Countess Sussex (age 26) were married. She by marriage Baroness Fitzwalter. She the daughter of Henry Stafford 2nd Duke of Buckingham and Catherine Woodville Duchess Buckingham Duchess Bedford. She a great x 4 granddaughter of King Edward III of England. 
On 23 Jul 1536 Henry Fitzroy 1st Duke Richmond and Somerset (age 17) died at St James's Palace [Map]. He was buried at Church of St Michael the Archangel Framlingham [Map]. Duke of Richmond and Somerset, Earl Nottingham 5C 1525 extinct.
Chronicle of Queen Jane and Two Years of Queen Mary 1553. 23 Jul 1553. A lettere written in London mentiones that the lord admirall, and the lords Greye (age 44),b Garret, Wormon,c and the lord Fitzwarren, sir Henry Sidney (age 24), and sir James Croffts (age 35), with divers others, have already their pardon graunted them.
The duke of Northumberland is in custody of the garde as a prisoner in Cambridge, and my ladie his wyfe, the lord Guilford (age 18), and the lady Jane (age 17), are in the Towere as prisoneres. My lord marques of Northampton, the earle of Huntingdon, sir Henry Gates, and divers other, cannot as yet gett their pardones."
Note b. William lord Grey of Wilton (age 44) was the commander upon whose military talents the duke of Northumberland seems to have mainly relied: but lord Grey, who had been an adherent of the duke of Somerset, probably did not serve on this occasion very cordially. He seems to have left Northumberland when at Cambridge, and made his submission to Mary; who on her arrival at her manor of Newhall in Essex, on the 31st of July, dismissed him to his former charge of the castle of Guisnes, with a reinforcement of 350 footmen and 50 horsemen demi-lances: see her letters patent, printed in the Appendix to the Life of Lord Grey of Wilton, No. VI.
Note c. The earl of Ormond.
Wriothesley's Chronicle. 23 Jul 1554. The 23 of Julie the Prince of Spayne (age 27) came to Winchesterd about vi of the clock at night, accompanied with noblemen as well of England as of his owne countriea, with trumpetts blowinge and bells ringinge, and came to the Cathedrall [Map] churche, where he alighted. And there the Bishop of Winchester, Lord Chauncellor (age 71), with 4 bishops more, with the priests, singinge-men, and children, receaved him with procession in riche copes and with iii crosses up into the quiere, where was a riche traves richlye hanged for him; and there he kneeled downe before the sacrament; and then the Lord Chauncellor began Te Deum, the organs playinge and the quier singinge the rest. This done he was brought out with torche light to his lodginge throughe the cloyster to the Deanes howsse, all the Queens garde standinge in their riche cotes all the waye. He was apparelled in a riche cote richlie imbroydered with goulde, and an hatt much like the same with a feather in it. The same night after he had supped, which was about x of the clock, certeyne of the Councell brought him to the Queen (age 38) by a secrett waye, where she receaved him right lovinglye and kissed him, and after halfe an howre they tooke their leave, eche kissinge the other, and so departed that night to his lodginge.
Note d. Philip lingered a few days at Southampton, where he disembarked, as if in order to ascertain the humour of the nation, as one of his ambassadors, the Count of Egmont (age 31), had been recently violently assaulted by the populace, who mistook him for his master.
Note a. He came well attended with a bodyguard and troops.
On 23 Jul 1577 Thomas Wenman (age 29) died. He left significant debts to the Crown requiring some of his lands to be sold. Eaton was sold to John Danvers (age 37) for £7700. Richard Wenman 1st Viscount Wenman (age 4) was made a ward of his mother Jane West (age 19) and Robert Dudley 1st Earl of Leicester (age 45). Robert Dudley 1st Earl of Leicester (age 45) sold his interest to James Cressy who subsequently married Jane West (age 19).
On 23 Jul 1596 Henry Carey 1st Baron Hunsdon (age 70) died at Somerset House [Map]. Queen Elizabeth I of England and Ireland (age 62) was present. She, apparently, proposed he be made Earl of Wiltshire. He refused saying ... "Madam, as you did not count me worthy of this honour in life, then I shall account myself not worthy of it in death". His son George Carey 2nd Baron Hunsdon (age 49) succeeded 2nd Baron Hunsdon 1C 1559. Elizabeth Spencer Baroness Hunsdon Baroness Eure (age 44) by marriage Baroness Hunsdon.
On 23 Jul 1603 King James I of England and Ireland and VI of Scotland (age 37) created a number Knights at the Royal Gardens Whitehall Palace:
Henry Savile 1st Baronet (age 24), William Morgan (age 43), George Carew, Baptist Hicks 1st Viscount Campden (age 46), Richard Musgrave 1st Baronet (age 18), James Calthorpe (age 44), Thomas Gresham (age 56), George Fane of Burston (age 22), Francis Fane 1st Earl of Westmoreland (age 23), Robert Chichester (age 25), William Pope 1st Earl Downe (age 29), Gervase Clifton 1st Baronet (age 15), Thomas Berkeley (age 28), Edward Montagu 1st Baron Montagu (age 40), William Herbert 1st Baron Powis (age 30), Anthony Irby (age 26), Drue Drury of Eccles and Rollesby in Norfolk and Arnold Lygon 15518 (age 45).
24 Jul 1603 Richard Browne Clerk (age 64).
On 23 Jul 1611 Frances Sutton 6th Baroness Dudley was born to Ferdinando Dudley (age 23) and Honora Seymour (age 18) at Dudley Castle [Map]. She was baptised 18 Aug 1611 at the same place.
In Jul 1660 King Charles II of England Scotland and Ireland (age 30) rewarded those who supported his Restoration ...
2nd. Maurice Berkeley 3rd Viscount Fitzhardinge (age 32) was created 1st Baronet Berkeley of Bruton in Somerset. Anne Lee Viscountess Fitzhardinge (age 37) by marriage Lady Berkeley of Bruton in Somerset.
4th. Thomas Myddelton 1st Baronet (age 35) was created 1st Baronet Myddelton of Chirk Castle.
6th. Varney Noel 1st Baronet was created 1st Baronet Noel.
7th. George Monck 1st Duke Albemarle (age 51) was created 1st Duke Albemarle 2C 1660, 1st Earl Torrington in Devon. Anne Clarges Duchess Albermarle (age 41) by marriage Duchess Albemarle.
12th. Robert Hales 1st Baronet (age 50) was created 1st Baronet Hales of Beakesbourne in Kent.
12th. Edward Montagu 1st Earl Sandwich (age 34) was created 1st Earl Sandwich. Jemima Crew Countess Sandwich (age 35) by marriage Countess Sandwich.
14th. Elizabeth Feilding Countess Guildford was created 1st Earl Guildford 1C 1660 by King Charles II of England Scotland and Ireland (age 30). The peerage for life.
18th. Samuel Morland 1st Baronet (age 35) was created 1st Baronet Morland of Sulhamstead Banister. Susanne de Milleville Lady Morland by marriage Lady Morland of Sulhamstead Banister.
23rd. Henry Vernon 1st Baronet (age 55) was created 1st Baronet Vernon of Hodnet in Shropshire.
23rd. John Aubrey 1st Baronet (age 54) was created 1st Baronet Aubrey of Llantrithyd in Glamorganshire.
On 23 Jul 1664 the Battle of St Gothard was a victory for the Imperial Army (Germans, Swedish and French) over the Ottoman army.
On 23 Jul 1666 Francis Willoughby 5th Baron Willoughby died. His brother William Willoughby 6th Baron Willoughby (age 50) succeeded 6th Baron Willoughby Parham. Anne Carey Baroness Willoughby Parham (age 51) by marriage Baroness Willoughby Parham.
On 23 Jul 1666 Thomas Parker 1st Earl Macclesfield was born to Thomas Parker (age 32).
On 23 Jul 1668 Greville Verney 17th Baron Latimer 9th Baron Willoughby (age 19) died. He was buried at Compton Verney Chapel [Map]. His son William Verney 18th Baron Latimer 10th Baron Willoughby succeeded 18th Baron Latimer of Corby 1C 1299, 10th Baron Willoughby Broke.
On 09 Jun 1691 Charles Maitland 3rd Earl Lauderdale died. His son Richard Maitland 4th Earl Lauderdale (age 41) succeeded 4th Earl Lauderdale although the Earldom was outlawed on 23 Jul 1694 as a consequence of his being a Jacobite.
On 23 Jul 1700 Bishop Nathaniel Crew 3rd Baron Crew (age 67) and Dorothy Forster Baroness Crewe (age 29) were married. She by marriage Baroness Crew of Stene in Northamptonshire. The difference in their ages was 37 years.
On 23 Jul 1701 John Kennedy 7th Earl Cassilis (age 47) died. His grandson John Kennedy 8th Earl Cassilis (age 1) succeeded 8th Earl Cassilis.
On 23 Jul 1706 Charles Bourbon Condé Count Charolais (age 6) died.
On 23 Jul 1723 William Stukeley (age 35) made sketches of Stanton Drew Great Circle [Map].
On 23 Jul 1724 Charles Emmanuel III King Sardinia (age 23) and Polyxena Hesse Rotenburg Queen Consort Sardinia (age 17) were married. Polyxena Hesse Rotenburg Queen Consort Sardinia by marriage Queen Consort Sardinia. He the son of Victor Amadeus King Sardinia (age 58) and Anne Marie Bourbon Queen Consort Sardinia (age 54). He a great grandson of King Charles I of England, Scotland and Ireland.
On 23 Jul 1727 John Monson 2nd Baron Monson was born to John Monson 1st Baron Monson (age 34) and Margaret Watson (age 32).
On 23 Jul 1727 Simon Harcourt 1st Viscount Harcourt (age 65) died. Some sources say 28 Dec 1727. His grandson Simon Harcourt 1st Earl Harcourt (age 13) succeeded 2nd Viscount Harcourt of Stanton Harcourt in Oxfordshire 1C 1721.
On 23 Jul 1728 Louis Henri Bourbon Condé Duke Bourbon (age 35) and Landgravine Caroline Hesse Rotenburg (age 13) were married. The difference in their ages was 22 years. He a great x 3 grandson of King James I of England and Ireland and VI of Scotland.
On 23 Jul 1738 John Rushout 1st Baron Northwick was born to John Rushout 4th Baronet (age 53) and Anne Compton Lady Rushout.
On 23 Jul 1748 David Murray 6th Viscount Stormont (age 58) died. His son David Murray 2nd Earl Mansfield (age 20) succeeded 7th Viscount Stormont.
On 23 Jul 1765 Francis Russell 5th Duke Bedford was born to Francis Russell (age 25) and Elizabeth Keppel (age 26). He a great x 2 grandson of King Charles II of England Scotland and Ireland.
On 23 Jul 1784 John Monson 2nd Baron Monson (age 57) died. His son John Monson 3rd Baron Monson (age 31) succeeded 3rd Baron Monson of Burton in Lincolnshire, 7th Baronet Monson of Carleton in Lincolnshire.
On 23 Jul 1810 Robert Monckton-Arundell 4th Viscount Galway (age 58) died.
On 23 Jul 1819 George Phipps 2nd Marquess Normanby was born to Constantine Phipps 1st Marquess Normanby (age 22) and Maria Liddell Marchioness Normanby (age 21).
On 23 Jul 1831 William Hare 2nd Earl Listowel (age 29) and Maria Augusta Windham Countess Listowel (age 26) were married.
On 23 Jul 1833 Spencer Cavendish 8th Duke Devonshire was born to William Cavendish 7th Duke Devonshire (age 25) and Blanche Georgiana Howard Duchess Devonshire (age 21). Coefficient of inbreeding 1.65%. 
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On 23 Jul 1844 George Annesley 2nd Earl Mountnorris (age 73) died. Earl Mountnorris of Mountnorris Castle in Armagh and Baron Altham 1C 1681 extinct. His half fourth cousin once removed Arthur Annesley 10th Viscount Valentia (age 58) succeeded 10th Viscount Valentia 2C 1642. Eleanor O'Brien Viscountess Valentia by marriage Viscountess Valentia.
On 23 Jul 1844 Washington Sewallis Shirley 9th Earl Ferrers (age 22) and Annabella Augusta Chichester Countess Ferrers were married. She by marriage Countess Ferrers. She the daughter of Edward Chichester 4th Marquess Donegal (age 45) and Amelia Ogrady Marchioness County Donegal.
On 23 Jul 1849 Alfred Wyatt-Edgell 5th Baron Braye was born to Reverend Edgell Wyatt-Edgell Baron Braye (age 48) and Henrietta Otway 4th Baroness Braye (age 40).
On 23 Jul 1855 Edward Fitzclarence (age 18) was killed at the Siege of Sevastopol.
Edwyn Sherard Burnaby (age 25) and Henry Hugh Manvers Percy (age 37) fought.
On 23 Jul 1874 Henry Monck 5th Viscount Monck (age 25) and Edith Caroline Sophia Scott Viscountess Monck (age 18) were married.
On 23 Jul 1876 Arthur Stanley Byng 10th Viscount Torrington was born to Sydney Bing (age 32).
On 23 Jul 1877 Geoffrey Duke Coleridge 3rd Baron Coleridge was born to Bernard Coleridge 2nd Baron Coleridge (age 25) and Mary Alethea Mackarness Baroness Coleridge. Coefficient of inbreeding 6.25%.
On 23 Jul 1887 Charles Robert Spencer 6th Earl Spencer (age 29) and Margaret Baring Countess Spencer were married at St James' Church, Piccadilly. He the son of Frederick Spencer 4th Earl Spencer and Adelaide Horatia Seymour-Conway Countess Spencer. He a great x 5 grandson of King James II of England Scotland and Ireland.
On 23 Jul 1915 Lieutenant-Colonel John Henry Trollope 2nd Baron Kesteven (age 63) died without issue. His nephew Thomas Carew Trollope 3rd Baron Kesteven (age 24) succeeded 3rd Baron Kesteven, 9th Baronet Trollope of Casewick in Lincolnshire.
On 23 Jul 1935 Antony Head 1st Viscount Head (age 28) and Dorothea Louise Ashley-Cooper Viscountess Head (age 28) were married. She the daughter of Anthony Ashley-Cooper 9th Earl of Shaftesbury (age 65) and Constance Grosvenor Countess of Shaftesbury (age 59).
On 23 Jul 1942 Christopher Makins 2nd Baron Sherfield was born to Roger Makins 1st Baron Sherfield (age 38) and Alice Brooks Davis.
On 23 Jul 1947 Anthony Gerard Edward Noel 5th Earl of Gainsborough (age 23) and Mary Stourton Countess Gainsborough (age 21) were married. She by marriage Countess Gainsborough. He the son of Arthur Noel 4th Earl of Gainsborough and Alice Mary Eyre Countess Gainsborough. He a great x 3 grandson of King William IV of the United Kingdom. 