Marburg's most important building is the Elisabethkirche, which marks the burial site of St. Elizabeth (1207–31), the town's favorite daughter. She was a Hungarian princess, betrothed at age 4 and married at 14 to a member of the nobility, Ludwig IV of Thuringia. In 1228, when her husband died in the Sixth Crusade, she gave up all worldly pursuits. She moved to Marburg, founded a hospital, gave her wealth to the poor, and spent the rest of her very short life (she died at the age of 24) in poverty, caring for the sick and the aged. She is largely responsible for what Marburg became. Because of her selflessness she was made a saint four years after her death. The Teutonic Knights built the Elisabethkirche, which quickly became a pilgrimage site, enabling the city to prosper. You can visit the shrine in the sacristy that once contained her bones, a masterpiece of the goldsmith's art. The church is a veritable museum of religious art, full of statues and frescoes. Walking tours of Marburg begin at the church on Saturday at 3, year-round. Tours inside the church are held Monday to Friday at 3 from April to October (€3.50) and Sunday shortly after Mass (around 11:15).