BAL114781 Interior of the basilica, early 4th century AD (photo); Aula Palatina, Trier, Germany; (add.info.: The Basilica of Constantine, Konstantinbasilika, Aula Palatina in Trier, Germany is a Roman palace basilica built by Emperor Constantine (AD 306-337); largest extant hall from antiquity; World Heritage Site. Hall is 67 m long; 26 m wide and 33 m high. Built around 310 AD; floor and wall heating system (hypocaust); bombed during WWII and repaired without any of the post-Roman decorations); out of copyright.