Looped Square - Wikipedia

The looped square (⌘) is a symbol consisting of a square with outward pointing loops at its corners. It is referred to by this name, for example, in works regarding the Mississippian culture.[1] It is also known as the place of interest sign[2] when used on information signs, a practice which started in Finland in the 1950s, spreading to the other

It is an ancient symbol used by several cultures, and remains in common use today. It belongs to a class of symbols which are called valknute in Norway.[4]