Metz is a city located in the Grand Est region of France, on the Moselle River. It is the capital of the Moselle department and the prefecture of the Grand Est region. Metz is the most populous city in the Moselle department, with a population of over 120, 000 people. It is known for its rich cultural heritage, including its Gothic cathedral, which is one of the largest in Europe. Metz is also home to several universities and is an important economic center in the region.