Temple of Janus, Autun

A Romano-Celtic religious structure in Autun, France, northwest of the ancient city of Augustodunum, dating to the second half of the 1st century AD. Despite its name, the temple's dedication to the god Janus has no archaeological basis, and the deity actually worshipped here remains unknown. The site lies at the center of a vast sanctuary complex revealed by excavations from 2013 to 2016. Two sides of the square cella survive to over 20 meters in height, making it one of the best-preserved Romano-Celtic temples in existence. The site's history extends back to Neolithic times, and the temple was abandoned in the early Middle Ages before being reused as a medieval defensive structure.