1396. Via Vidin, Bulgaria, the remains reached Belgrade in 1403. According to folk legend, wherever the caravan was stopping, the miraculous, healing water springs would appear. Above one of the springs in the fortress, at the location of modern church, the chapel and the church were built. The church was dedicated to the Mary, mother of Jesus, and the water from the spring flew under its foundations. The remains of Saint Petka remained in Belgrade until 1521, kept in the rock nabove the spring. When the Ottomans conquered the city that year, the remains were transferred to Iași in Moldavia (modern Romania) and the church was demolished. Saint Petka's two fingers are still being kept in the modern Ružica Church as its most valuable relic. The cult of Saint Petka as the healer was so strong, that members of all confessions (Orthodox, Catholics, Muslims), pilgrimaged the spring named after her in the fortress, which was believed to heal the blindness. The surviving remains of the church and the chapel were demolished by the Ottomans in the late 17th century. Origin During their 1718-1739 occupation of Belgrade and northern Serbia, the Austrians built a gunpowder magazine next to the spring. It was part of the 1723-1739 Baroque reconstruction of the fortress, and the entire city outside the ramparts, conducted by . Though obliged by the treaty to demolish everything that was built within the fortress during their occupation, the Austrians didn't destroy the magazine which remained as one of the rare object that survived. The Ottomans continued to use it for the same purpose. During his first reign, prince Miloš Obrenović referred to the church in his correspondence with the Belgrade's Yusuf Pasha. When pasha asked for Miloš to repair the damaged minaret of the Batal Mosque in Belgrade, prince responded that "within the ramparts there are two churches, where the Turks keep their ammunition, but they don't allow the Serbs to repair them". The location was strongly embedded into the collective folk remembrance at the time, due to its alleged ancient origins and miraculous spring of Saint Petka. The myth surrounding the church especially developed in the 19th century, when population believed that Turks adapted the ancient church into the gunpowder magazine. Only 5 days after the Ottomans were fully expelled from the Belgrade Fortress on , and on the day when Serbian army entered the fortress, Metropolitan of Belgrade