Remains of grand building that may have housed up to 20,000 scrolls uncovered in central Cologne, dating back to second century AD

The remains of the oldest public library in Germany, a building erected almost two millennia ago that may have housed up to 20,000 scrolls, have been discovered in the middle of Cologne.

‘Really incredible’ … the site of the second-century library discovered in Cologne.
‘Really incredible’ … the site of the second-century library discovered in Cologne. © Hi-flyFoto/Roman-Germanic Museum of Cologne

The walls were first uncovered in 2017, during an excavation on the grounds of a Protestant church in the centre of the city. Archaeologists knew they were of Roman origins, with Cologne being one of Germany’s oldest cities, founded by the Romans in 50 AD under the name Colonia. But the discovery of niches in the walls, measuring approximately 80cm by 50cm, was, initially, mystifying.

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“It dates from the middle of the second century and is at a minimum the earliest library in Germany, and perhaps in the north-west Roman provinces,” he said. “Perhaps there are a lot of Roman towns that have libraries, but they haven’t been excavated. If we had just found the foundations, we wouldn’t have known it was a library. It was because it had walls, with the niches, that we could tell.”

The building would have been used as a public library, Schmitz said. “It is in the middle of Cologne, in the marketplace, or forum: the public space in the city centre. It is built of very strong materials, and such buildings, because they are so huge, were public,” he said.