The Arian Baptistry, located in Ravenna, Italy, is a significant Christian monument constructed by the Ostrogothic King Theodoric the Great. Built between the late 5th and early 6th centuries, it served as a place of worship for Arian Christians, distinct from the Catholic community. The baptistry is renowned for its stunning mosaic, which depicts the baptism of Jesus and is a testament to the religious and artistic heritage of the time. Today, it stands as a UNESCO World Heritage Site, preserving the legacy of the Ostrogoths and the historical era of Arian Christianity.