By the end of the 10th century, the mausoleum had become largely buried under earth and overgrown with trees, to the point where it was referred to as the "Mons Augustus". A legend of the time referred to a supposed decree by Augustus who ordered that a basketful of earth from every province of the empire was to be thrown upon his tomb, so that he could rest on the soil of the whole world over which he ruled. Atop the Mausoleum stood a chapel built to the Archangel Michael, while alongside was the Church of Santa Maria (or perhaps Martina) in Augusto (later transformed into San Giacomo degli Incurabili).