On 23 Mar 1361 Henry of Grosmont 1st Duke Lancaster (age 51) died at Leicester Castle [Map]. He was buried at Church of the Annunciation of our Lady of the Newark [Map].

Duke Lancaster, Earl Lincoln extinct.

Blanche Plantagenet Duchess Lancaster (age 15) succeeded 5th Countess Lancaster and 2nd Countess Derby. John of Gaunt 1st Duke Lancaster (age 21) by marriage Earl Lancaster, Earl Derby.

Maud Plantagenet Duchess Lower Bavaria (age 21) succeeded 5th Countess of Leicester.