I know about 5 places relevant to your query. One of them is:
https://pleiades.stoa.org/places/588236457
Roman amphitheater at Trier
The Roman amphitheater at Trier dates to the reign of Antoninus Pius and was renovated under Constantius Chlorus. The arena measures ca. 71 x 47.5 meters.
For all matches, reply with "list named amphitheatre"
@pleiades list named amphitheatre