Kolumba is a building in Cologne, Germany by Peter Zumthor that was built in 2003. It is an art museum that was founded in the 1800’s. The interesting thing about this building is that it is on the site of an old Gothic Church and a chapel from the 1950’s. The Gothic church was destroyed in World War 2 and the newer chapel built on its the ruins. It is called the Kolumba building for the Kolumba stones, which are the light grey stones that you see in the picture. There are a bunch of holes in the walls that allow different levels of light into the museum throughout different times of the day. The interior is very open and sometimes even roofless like a courtyard. The big grey walls make it seem more like a fort holding some treasure than an art museum. At first glance I thought it was ugly, but I grow to appreciate its simplicity the more that I look at it. 

https://en.wikipedia.org/wiki/Kolumba

https://www.inessabinenbaum.com/kolumba