The Roman-Germanic Museum (or RGM, in German: Römisch-Germanisches Museum) is an important archaeological museum located in Cologne, Germany. The museum, opened in 1974, is situated next to Cologne Cathedral, on the site of a 3rd-century Roman villa, discovered in 1941 during the digging of an air raid shelter.
The museum features a significant collection of objects from the excavations of the ancient Roman colony of Colonia Claudia Ara Agrippinensium, from which the modern city of Cologne derives. It was built with the idea of protecting in situ the Roman villa and its famous mosaic of Dionysus, as well as a section of the adjoining Roman road.
Thus, the museum is itself an archaeological site.
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