11 Mar is in March.
On 11 Mar 1152 the marriage of Louis VII King Franks (age 32) and Eleanor of Aquitaine Queen Consort Franks and England (age 30) was dissolved by Hugh Toucy Archbishop Sens in Château de Beaugency, Beaugency, Loiret on the grounds of consanguinity. Both Louis and Eleanor were present as were the Archbishops of Rouen and Bordeaux. Samson Mauvoison Archbishop Reims acted on behalf of Eleanor. In dissolving the marriage Louis lost control of the Duchy of Aquitaine which was to have far reaching consequences for the next three centuries.
On 11 Mar 1194 King Richard "Lionheart" I of England (age 36) was re-crowned I King England at Winchester Cathedral [Map]. Bishop William de Vere was present.
On 11 Mar 1214 Hawise Blois 2nd Countess Albemarle aka Aumale and Essex died. Her son William Forz 3rd Earl Albemarle aka Aumale succeeded 3rd Earl Albemarle aka Aumale1C 1127.
Before 11 Mar 1290 Robert Fitzwalter 1st Baron Fitzwalter (age 43) and Eleanor Ferrers Baroness Fitzwalter were married. She the daughter of Robert Ferrers 6th Earl of Derby and Eleanor Bohun Countess Derby (age 47). He a great grandson of King Henry "Curtmantle" II of England. She a great x 5 granddaughter of King Henry I "Beauclerc" England. 
On 11 Mar 1296 John le Romeyn Archbishop of York (age 66) died at Bishop Burton.
On 11 Mar 1352 William Zouche 1st Baron Zouche Harringworth (age 75) died at Harringworth [Map]. He was buried at Biddlesden Abbey [Map]. His grandson William Zouche 2nd Baron Zouche Harringworth (age 30) succeeded 2nd Baron Zouche Harringworth. Elizabeth Ros Baroness Zouche Harringworth by marriage Baroness Zouche Harringworth.
On 11 Mar 1359 John Melun 1st Count Tancarville (age 69) died.
On 11 Mar 1486 Albert "Achilles" Hohenzollern Elector Brandenburg (age 71) died. His son John "Cicero" Hohenzollern Elector Brandenburg (age 30) succeeded Elector Brandenburg.
On 11 Mar 1503 John Stewart 1st Earl Mar (age 23) died.
On 11 Mar 1530 Johann Wilhelm Wettin Duke Saxe Weimar was born to Johann Frederick I Duke Saxony (age 26).
On or before 11 Mar 1562 Richard Neale Archbishop was born. He was baptised on 11 Mar 1562 at St Margaret's Church, Westminster [Map].
On 11 Mar 1573 Edmund Brydges 2nd Baron Chandos (age 51) died. His son Giles Brydges 3rd Baron Chandos (age 25) succeeded 3rd Baron Chandos of Sudeley.
On 11 Mar 1620 Bishop Martin Fortherby (age 60) died.
On 11 Mar 1630 Robert Devereux 3rd Earl Essex (age 39) and Elizabeth Paulet Countess Essex were married. She by marriage Countess Essex. He the son of Robert Devereux 2nd Earl Essex and Frances Walsingham Countess Essex (age 63). They were fourth cousins.
On 11 Mar 1661 Mary Scott 3rd Countess Buccleuch (age 13) died. Her sister Anne Scott Duchess Monmouth and Buccleuch (age 10) succeeded 4th Countess Buccleuch.
Pepy's Diary. 11 Mar 1667. By and by comes Sir H. Cholmly (age 34) to me about Tangier business, and then talking of news he tells me how yesterday the King (age 36) did publiquely talk of the King of France's (age 28) dealing with all the Princes of Christendome. As to the States of Holland, he [the King of France (age 28)] hath advised them, on good grounds, to refuse to treat with us at the Hague, because of having opportunity of spies, by reason of our interest in the House of Orange; and then, it being a town in one particular province, it would not be fit to have it, but in a town wherein the provinces have equal interest, as at Mastricht, and other places named. That he advises them to offer no terms, nor accept of any, without his privity and consent, according to agreement; and tells them, if not so, he hath in his power to be even with them, the King (age 36) of England being come to offer him any terms he pleases; and that my Lord St. Albans (age 61) is now at Paris, Plenipotentiary, to make what peace he pleases; and so he can make it, and exclude them, the Dutch, if he sees fit. A copy of this letter of the King of France's (age 28) the Spanish Ambassador here gets, and comes and tells all to our King; which our King denies, and says the King of France (age 28) only uses his power of saying anything. At the same time, the King of France (age 28) writes to the Emperor, that he is resolved to do all things to express affection to the Emperor, having it now in his power to make what peace he pleases between the King of England (age 36) and him, and the States of the United Provinces; and, therefore, that he would not have him to concern himself in a friendship with us; and assures him that, on that regard, he will not offer anything to his disturbance, in his interest in Flanders, or elsewhere. He writes, at the same time, to Spayne, to tell him that he wonders to hear of a league almost ended between the Crown of Spayne and England, by my Lord Sandwich (age 41), and all without his privity, while he was making a peace upon what terms he pleased with England: that he is a great lover of the Crown of Spayne, and would take the King (age 36) and his affairs, during his minority, into his protection, nor would offer to set his foot in Flanders, or any where else, to disturb him; and, therefore, would not have him to trouble himself to make peace with any body; only he hath a desire to offer an exchange, which he thinks may be of moment to both sides: that is, that he [France] will enstate the King of Spayne (age 5) in the Kingdom of Portugall, and he and the Dutch will put him into possession of Lisbon; and, that being done, he [France] may have Flanders: and this, they say; do mightily take in Spayne, which is sensible of the fruitless expence Flanders, so far off, gives them; and how much better it would be for them to be master of Portugall; and the King of France (age 28) offers, for security herein, that the King (age 36) of England shall be bond for him, and that he will countersecure the King of England (age 36) with Amsterdam; and, it seems, hath assured our King, that if he will make a league with him, he will make a peace exclusive to the Hollander. These things are almost romantique, but yet true, as Sir H. Cholmly (age 34) tells me the King (age 36) himself did relate it all yesterday; and it seems as if the King of France (age 28) did think other Princes fit for nothing but to make sport for him: but simple Princes they are, that are forced to suffer this from him. So at noon with Sir W. Pen (age 45) by coach to the Sun in Leadenhall Street [Map]e, where Sir R. Ford (age 53), Sir W. Batten (age 66), and Commissioner Taylor (whose feast it was) were, and we dined and had a very good dinner. Among other discourses Sir R. Ford (age 53) did tell me that he do verily believe that the city will in few years be built again in all the greatest streets, and answered the objections I did give to it. Here we had the proclamation this day come out against the Duke of Buckingham (age 39), commanding him to come in to one of the Secretaries, or to the Lieutenant of the Tower (age 52). A silly, vain man to bring himself to this: and there be many hard circumstances in the proclamation of the causes of this proceeding of the King's, which speak great displeasure of the King's, and crimes of his. Then to discourse of the business of the day, that is, to see Commissioner Taylor's accounts for his ship he built, The Loyall London, and it is pretty to see how dully this old fellow makes his demands, and yet plaguy wise sayings will come from the man sometimes, and also how Sir R. Ford (age 53) and Sir W. Batten (age 66) did with seeming reliance advise him what to do, and how to come prepared to answer objections to the Common Council.
After 11 Mar 1668. Memorial at St Peter's Church, Tawstock [Map] to George Fane (deceased)
George Fane: On 08 Mar 1668 he was born to Henry Fane (age 18) and Elizabeth Southcott. On 11 Mar 1668 he died at three days old.
On 11 Mar 1676 William Courtenay 6th Earl Devon was born to Francis Courtenay (age 25) and Mary Boevey.
On 11 Mar 1685 William Flower 1st Baron Castle Durrow was born to Thomas Flower and Mary Temple.
On 11 Mar 1693 Henry Johnson Baron Wentworth (age 31) and Martha Lovelace 8th Baroness Wentworth (age 26) were married.
On 11 Mar 1701 Joseph Leeson 1st Earl of Milltown was born.
On 11 Mar 1705 Margaret Wemyss Countess Cromartie 3rd Countess Wemyss (age 46) died. Her son David Wemyss 4th Earl Wemyss (age 27) succeeded 4th Earl Wemyss.
Minutes of the Society of Antiquaries. 11 Mar 1719. It was proposed that [?] noblemen and persons of quality as please to be members of the Society may be admitted by Ballot.
Ordered the same day a dividend of one print more of Ulphus's Horn to every member.
Resolved that Mr Vertue (age 35) goe to Kensington Pallace to view the pictures of Holbein, copied there by Remy, the originals being burned in Whitehall.
Resolved that in Mr Samuel Gale's (age 36) dissertation upon Ulphus's Horn be revised by Mr President (age 58), Mr Roger Gale (age 46), Mr Mickleton and Mr Holmes (age 57), or any three of them, and then printed.
NB. Ten members were present when the last resolution was made.
On 11 Mar 1720 Louis 6th Duke of Gramont (age 30) and Geneviève de Gontaut (age 24) were married.
On 11 Mar 1721 George Neville 13th and 11th Baron Bergavenny (age 62) died. His son George Neville 14th and 12th Baron Bergavenny (age 18) succeeded 14th Baron Bergavenny 1C 1392, 12th Baron Bergavenny 2C 1450.
On 11 Mar 1725 Cardinal Henry Benedict Stewart was born to James "Old Pretender" Stewart (age 36) and Maria Clementina Sobieska (age 22). He a grandson of King James II of England Scotland and Ireland.
On 11 Mar 1753 Charles Stourton 15th Baron Stourton (age 51) died without issue. His brother William Stourton 16th Baron Stourton (age 48) succeeded 16th Baron Stourton. Winifrede Howard Baroness Stourton (age 26) by marriage Baroness Stourton.
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Before 11 Mar 1793 Henry Willoughby 6th Baron Middleton (age 31) and Jane Lawley Baroness Middleton (age 26) were married.
On 11 Mar 1793 William Ponsonby 2nd Earl Bessborough (age 89) died. His son Frederick Ponsonby 3rd Earl Bessborough (age 35) succeeded 3rd Earl Bessborough.
On 11 Mar 1793 Robert Lawley 5th Baronet (age 57) died. His son Robert Lawley 1st Baron Wenlock (age 25) succeeded 6th Baronet Lawley of Spoonhill in Shropshire.
On 11 Mar 1797 Edwin Sandys 2nd Baron Sandys (age 70) died without issue. Baron Sandys of Ombersley in Worcestershire extinct. His estates passed to his niece Mary Sandys Marchioness Downshire (age 33).
On 11 Mar 1798 Thomas Fremantle 1st Baron Cottesloe was born to Vice-Admiral Thomas Francis Fremantle (age 32).
On 11 Mar 1799 Thomas Bruce 11th Earl Kincardine 7th Earl Elgin (age 32) and Mary Nisbet Countess Elgin (age 20) were married. She by marriage Countess Elgin. They had two sons and three daughters. They divorced before 20 Apr 1808 she having been accused of having an affair with Robert Ferguson of Raith (age 29) whom she subsequently married. The Earl sued Ferguson in both England and Scotland and won £10,000. He the son of Charles Bruce 9th Earl Kincardine 5th Earl Elgin.
On 11 Mar 1800 Philip Sidney 1st Baron De Lisle and Dudley was born to John Shelley-Sidney 1st Baronet (age 29) and Henrietta Hunloke (age 16).
On 11 Mar 1827 Dudley Fitzgerald De Ros 23rd Baron Ros Helmsley was born to William Fitzgerald De Ros 22nd Baron Ros Helmsley (age 29) and Georgiana Lennox Baroness Ros Helmsley (age 31). Coefficient of inbreeding 1.58%. 
On 11 Mar 1833 William Manners aka Tollemache 1st Baronet (age 66) died. His son Lionel Tollemache 8th Earl Dysart (age 38) succeeded 2nd Baronet Tollemache of Hanby Hall in Lincolnshire.
On 11 Mar 1869 Christian August Oldenburg II Duke Schleswig Holstein Sonderburg Augustenburg (age 70) died. His son Frederick Christian Oldenburg II Duke Schleswig Holstein Sonderburg Augustenburg (age 39) succeeded II Duke Schleswig Holstein Sonderburg Augustenburg.
On 11 Mar 1889 Jacob Pleydell-Bouverie 4th Earl Radnor (age 73) died. His son William Pleydell-Bouverie 5th Earl Radnor (age 47) succeeded 5th Earl Radnor 2C 1765, 6th Viscount Folkestone, 6th Baron Longford 1C 1747, 8th Baronet Bouverie of St Catherine Cree Church in London. Mary Augusta Frederica Grimston Countess Radnor by marriage Countess Radnor.
On 11 Mar 1895 Frederick George Brabazon Ponsonby 6th Earl Bessborough (age 79) died. His brother Walter William Brabazon Ponsonby 7th Earl Bessborough (age 73) succeeded 7th Earl Bessborough. Louisa Susan Cornwallis Eliot Countess Bessborough (age 69) by marriage Countess Bessborough.
On 11 Mar 1913 Godfrey Morgan 1st Viscount Tredegar (age 81) died unmarried. He was buried at St Basil's Church Bassaleg. Viscount Tredegar of Tredegar in Monmouthshire extinct. His nephew Courtenay Morgan 1st Viscount Tredegar (age 45) succeeded 3rd Baron Tredegar of Tredegar in Monmouthshire, 5th Baronet Morgan of Tredegar.
On 11 Mar 1915 Wyndham Knatchbull-Hugessen 3rd Baron Brabourne (age 29) was killed in action. He was unmarried. His uncle Cecil Knatchbull-Hugessen 4th Baron Brabourne (age 51) succeeded 4th Baron Bradbourne.
On 11 Mar 1923 Charles Stourton 23rd Baron Stourton 25th Baron Segrave 24th Baron Mowbray was born to William Stourton 22nd Baron Stourton 24th Baron Segrave 23rd Baron Mowbray (age 27).
On 11 Mar 1929 Lawrence Dundas 1st Marquess Zetland (age 84) died at his home Aske Hall North Yorkshire. His son Lawrence John Lumley Dundas 2nd Marquess Zetland (age 52) succeeded 2nd Marquess Zetland Shetland, 4th Earl Zetland Shetland, 5th Baron Dundas, 6th Baronet Dundas of Kerse.
On 11 Mar 1936 William Legge 6th Earl Dartmouth (age 84) died. On 11 Mar 1936 His son William Legge 7th Earl Dartmouth (age 55) succeeded 7th Earl Dartmouth. Ruperta Wynn Carington Countess Dartmouth (age 53) by marriage Countess Dartmouth.
On 11 Mar 1946 Edward Fitzgerald 7th Duke Leinster (age 53) and Jessie Smither aka Denise Orme Duchess Leinster (age 60) were married. She by marriage Duchess Leinster. He the son of Gerald Fitzgerald 5th Duke Leinster and Hermione Wilhelmina Duncombe Duchess Leinster.
On 11 Mar 1953 Lancelot Edward Lowther 6th Earl Lonsdale (age 85) died. His grandson James Lowther 7th Earl Londsdale (age 30) succeeded 7th Earl Lonsdale 2C 1807.
On 11 Mar 1961 Allen Bathurst 9th Earl Bathurst was born to Henry Allen John Bathurst 8th Earl Bathurst (age 33).
On 11 Mar 1972 John Albert William Spencer-Churchill 10th Duke Marlborough (age 74) died. His son John Spencer-Churchill 11th Duke of Marlborough (age 45) succeeded 11th Duke Marlborough, 11th Marquess of Blandford, 11th Earl of Marlborough 2C 1689, 11th Baron Churchill of Sandridge in Hertfordshire, 13th Earl of Sunderland 2C 1643, 15th Baron Spencer Wormleighton.
On 11 Mar 1988 Nicholas Eliot 9th Earl of St Germans (age 74) died at Tangier. His son Peregrine Nicholas Eliot 10th Earl of St Germans (age 47) succeeded 10th Earl St Germans, 11th Baron Eliot of St Germans in Cornwall.
