Trier Amphitheatre

The Trier Amphitheatre is a Roman amphitheatre in Trier, Germany, built in the mid-2nd century AD during the rule of Antoninus Pius. Measuring 120 by 145 meters and dug into the slope of the Petrisberg hill, it could accommodate approximately 20,000 spectators, making it the 10th largest surviving Roman amphitheatre. It hosted gladiatorial contests and also served a defensive role as part of the city walls. The amphitheatre is designated as part of the UNESCO World Heritage Site "Roman Monuments, Cathedral of St. Peter and Church of Our Lady in Trier," inscribed in 1986.