The area was first inhabited by the Celts. The Romans, who arrived in 65 BC, built the Castel on Celtic foundations to protect the road from Metz to Trier. It was one of Charlemagne's nieces, Muomina, who is behind the village's name. In the 9th century, she donated all her possessions including the little village to Echternach Abbey. The village was subsequently called Muomendorph. Over the centuries, Mondorf was frequently attacked, burnt down and rebuilt. St Michael's Church from 1065 was rebuilt on four occasions, the last time in 1764.

The major contributor to Mondorf's economy is Casino 2000 as a hotel, restaurant, gaming centre and business venue. Other contributors are the town's restaurants, its tourists, arts and crafts interests as well as agriculture and viticulture. The Domaine Thermal attracts visitors to the spa as well as those interested in its hotel and restaurants and its conference facilities.

When someday comes you'll need to get in.

When someday comes you'll need to be able to get around.