A martial art school, dojang, dojo, etc. is where the martial arts are taught and practiced. Although an instructor may teach the martial arts anywhere, such as at a church or college, or in a garage, the term school usually refers to a profit or non-profit business facility that is dedicated to teaching the martial arts.
Facility: About the school building; fixtures, floors, decor, etc.
Flags: About flags that are seen hanging in a school.