The Mausoleum of Theodoric is a remarkable architectural feat from the early 6th century. It stands as a testament to the Ostrogothic King Theodoric the Great. Located in Ravenna, Italy, this structure is unique for its combination of Roman and Gothic elements. The mausoleum is particularly famous for its massive roof stone, which is a single piece of Istrian limestone weighing around 230 tons. It has been a UNESCO World Heritage Site since 1996, reflecting its historical and architectural significance.