All that is known of John's life is what he records in his
Descriptio. He says that he was a priest of the
church of Würzburg and he dedicated his work to a friend named Dietrich (Theoderic). The Tegernsee manuscript calls John the
bishop of Würzburg, but there was no bishop named John. Possibly the copyist or whoever added the description of John to the Tegernsee manuscript confused him with his friend, who is sometimes identified with
Dietrich of Hohenburg, who was bishop of Würzburg in 1223–24. This identification is not certain. John's pilgrimage took place while the holy places belonged to the Christian
Kingdom of Jerusalem, but before the major renovation of the
Church of the Holy Sepulchre. He may have written his
Descriptio several decades after the pilgrimage, possibly after 1200. His account is not entirely based on what he himself saw, he admits that he made use of eyewitness reports and in some cases borrowed from other travel guides (especially
Fretellus). He probably landed at
Acre, when he travelled to
Nazareth,
Jenin,
Nablus,
Jerusalem,
Bethlehem and
Jaffa, where he took ship home. His description of these places is mostly that of an eyewitness. ==
Descriptio==