Bertrandon de la Broquiere was esquire to Philip the Good, Duke of Burgundy.
Philip had plans for a new Crusade to the Holy Land and as part of this plan he persuaded Bertrandon to undertake a pilgrimage to the Holy Land to gather intelligence.
Bertrandon set off in 1432 disguised as a pilgrim but acting as a spy for Philip, noting important details of the military, political and cultural aspects of Mamluk and Ottoman lands.
The resulting account of his travels, translated into English by Thomas.