 The dedication of the cathedral to St. John the Baptist is explained in an account given by the same historian that a lady of Bazas, whom certain hagiographers of the 19th century believe to have been St. Veronica, brought from Palestine a relic of St. John the Baptist at the time of that saint's death.Pope Urban II (1088–99) preached the crusade at Bazas.Bazas was a subprefecture until 1923, when it lost this role to Langon.