A columbarium is usually known as a resting place for urns of the dead, although the word can be used to describe pigeon nesting boxes.
If you have been to a cemetery recently, you may have noticed columbaria without knowing what they are. They can be outdoors, indoors, free-standing or a room of their own inside a church. For example, my husband's grandparents rest in a columbaria inside a mausoleum with a glass front opening.
Columbaria span cultures and the globe with several structures noted on Wikipedia.