According to the tradition, Saint Denis picked up his head and carried it to a secret Christian cemetery of Vicus Cattulliacus about six miles away. A different version of the legend says that a devout Christian woman, Catula, came at night to the site of the execution and took his remains to the cemetery. The hill where he was executed, Mount Mercury, later became the Mountain of Martyrs ("Mons Martyrum"), eventually Montmartre.[23] A church was built on the site of the grave of St. Denis, which later became the Basilica of Saint-Denis.