Part antiquities collection, part archeological dig, the Roman-Germanic museum (or Römisch-Germanische Museum) sits atop the last vestiges of the Roman town villa. In the museum's basement is a well-known Dionysus mosaic, undisturbed from its original installation.
Remnants of Roman architecture, inscriptions, portraits of Caesar Augustus and his ceramics and more piece together the story of Cologne's development from a Germanic tribal settlement (the Ubii), to the Roman Cologne, to the capital of the Lower Germania.
Other highlights of the museum are the 15 meters (50 foot) high sarcophagus of Poblicius, a legionnaire from the first century AD. Like the mosaic and the Roman road outside, this funereal monument was uncovered during excavations in the city. The collection also contains the largest collection of Roman glass, more mosaics and ceramics, as well as the stone, clay and bronze idols specific to various Roman cults.
Tours are available, but the museum is fairly easy to negotiate by oneself. Given the wealth of archeological finds in the surrounding area, the Roman-Germanic Museum is one of the most important museums in the world, and is one of the most popular museums in all of Germany.