Exposed Brick Walls

Exposed brick walls were very popular in the late 1900s as people were finding it cheaper to expose the brick in the old houses rather than repairing or replacing damaged plaster. 
Nowadays exposed brick plays a role of a design feature, which adds an rustic charm to the interior. 
There are a lot of tutorials online showing how to expose the brick or how to create an effect of a brick wall if your building does not actually have one.