14th century English knight Sir John Sully was buried in the Church of the Holy Cross in Exeter, England after dying at the advanced age of 106. His great age is documented in part by a deposition in which he discusses his long military career and some of the battles in which he participated. The website includes a transcript of the deposition.
From the website:
"The deposition, together with many other well-researched sources, gives us an idea of just how involved Sir John was in the big battles of the early part of the Hundred Years War with France, with Edward II's Scottish Campaign of 1313-17 and Edward III's Scottish victories of 1332-33."