Pilgrims traveled to Saint Mauritius, often to the church of the springs, where they drank from the blessed, bubbling waters of the Mauritius springs in the hopes of being healed. In 1519, the Medici pope, Leo X, promised full absolution to anyone making a pilgrimage to the church of the springs. In the 16th century, the first scientific treatises about the St. Moritz mineral springs were written. In 1535, Paracelsus, the great practitioner of natural remedies, spent some time in St. Moritz.