According to late medieval tradition, the Flemish Count Thierry of Alsace (ca. 1099-1168) brought the relic of the Holy Blood from Jerusalem after the Second Crusade. Thierry was supposed to have been given the relic by Jerusalem’s Patriarch, as a mark of appreciation for his heroism during the Crusade. His brother in law, Baldwin III of Anjou, was King. Count Thierry brought the relic to the Sint-Baseliuskapel on the Burg on 7th April 1150. He was accompanied by his wife Sybilla of Anjou and by Leonius, the Abbot of the Sint-Bertijnsabdij in Saint-Omer.