The Mausoleum of Theodoric (Italian: Mausoleo di Teodorico) is an ancient monument just outside Ravenna, Italy. It was built in 520 by Theodoric the Great as his future tomb.
Its current structure is divided into two decagonal orders, one above the other and both made of Istria stone. Its roof is a single 300–ton Istrian stone, 10 meters in diameter. A niche leads down to a room which was probably a chapel for funeral liturgies. A stair leads to the upper floor. Located in the centre of the floor is a circular porphyry tub, in which Theodoric was supposed to be buried. His remains were removed during Byzantine rule, when the mausoleum was turned into a Christian oratory. Silting from the nearby rivulet resulted in the mausoleum being partly submerged by the late 19th century, when it was drained and excavated.
It was inscribed with seven other "Early Christian Monuments and Mosaics of Ravenna" buildings as one of the UNESCO World Heritage Sites in 1996. According to the ICOMOS evaluation, "the significance of the mausoleum lies in its Gothic style and decoration, which owe nothing to Roman or Byzantine art" and in the fact that "it is the only surviving example of a tomb of a barbarian king of this period".