The Towering Mausoleum of the Ostrogoth King, Theodoric

This ancient edifice, known as the Mausoleum of Theodoric the Great, remains just beyond Ravenna's city limits. It was erected in the year AD 520 by none other than Theodoric the Great, the king of the Ostrogoths, with the intention of it serving as his final resting place. The Mausoleum features two distinctive layers of decagonal designs, crafted from Istrian stone transported from a quarry almost 400 kilometers (249 miles) distant. However, the most eye-catching aspect of this monument is its towering, singular, intricately carved stone roof, measuring 10 meters (33 feet) across and weighing an astonishing 230 tonnes.

The structure also hosts a niche leading down to a possible chapel for funeral rites and an external stairway ascending to the upper floor.A remnant of an ancient Roman porphyry tub from a bathing complex is situated on the upper floor, where it's believed Theodoric was interred. However, during the Byzantine era, the mausoleum was converted into a Christian oratory, and Theodoric's remains were relocated. In the late 19th century, a nearby rivulet's silt, which had partially submerged the mausoleum, was drained and excavated.

Sources: Wikipedia, OpenStreetMap, Wikidata, Wikimedia Commons