Roman villa Otrang, Archaeological site in Fließem, Germany.

Roman villa Otrang is a Roman villa rustica near Fließem, about 5 km north of Bitburg. Its 60 × 60 m manor house held 66 rooms, with a cryptoporticus facing the valley and a bath suite of frigidarium, tepidarium and caldarium. A 379 × 132 m wall enclosed the farmyard, stables, barns and a small 22 × 11.35 m manager's villa in the west.

This villa developed during Roman times as a wealthy estate in a Germanic province. In the 1800s, a farmer discovered ancient mosaics while working the fields, which led to the site being protected and preserved.

The name Otrang probably comes from old field names like Oterancum or Aterancum recorded on historical maps. The estate's lands once reached from the Roman road Trier–Cologne in the west to the Kyll in the north and the Langmauer in the south. A bronze tablet found near the villa bears an inscription to Lenus Mars, and a limestone head of an over-life-size Mars statue from the temple precinct belonged to a central cult image.

The site lies about 5 km north of Bitburg in hilly terrain; the manor house stands in the east of the walled rectangle, the small steward's villa and the entrance from the Roman road in the west. The two temples are 400 m to the southeast, and nothing of them is visible today. The exposed foundations and mosaics are protected by 19th-century shelters, which are themselves listed monuments.

The two bathhouses were not a replacement: the first, in the north of the manor, had frigidarium, tepidarium and caldarium, and a larger bath was later added in the northwest risalit with the same three rooms. Parts of the hypocaust heating system and of the baths can still be seen.