Arian Baptistry (church building) built
401 CE.
Shown on the map at 44.419°, 12.202°.
The Arian Baptistry in Ravenna, Italy is a Christian baptismal building that was erected by the Ostrogothic King Theodoric the Great between the end of the 5th century and the beginning of the 6th century A.D., at the same time as the Basilica of Sant' Apollinare Nuovo. Theodoric the Great was an Arian Christian who spent his formative years as a hostage in Constantinople, where he received a comprehensive education that included imperial customs. As an adult Theodoric's political cunning and martial feats gained him the respect of other Goths. After years of movement within the Roman Empire, a treaty agreement with Emperor Zeno resulted in the Goths being given Ravenna to rule in the emperor's name. Arian Christianity required separate places of worship from Chalcedonian Christianity. Theodoric did not uproot the Chalcedonian Christians who lived in Ravenna.
Text from the Wikipedia article Arian Baptistery, licensed CC BY-SA 4.0.