dani G.
Google
It's an amazing museum with a really bad website. The most important permanent exhibition is by far the original Neanderthal man, found in 1856 at the Neander valley not far from Bonn. This is an amazing finding, very well displayed and explained on the museum ground floor, extremely interesting.
The rest of the floors have some Roman and Middle Ages findings and some Reinessance art, which are all nice, with the upper floor dedicated to temporary modern art exhibitions.