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. It is also known as the place of interest sign when used on information signs, a practice which started in Finland in the 1950s, spreading to the other Nordic countries in the 1960s. Also, the symbol is known as Saint John's Arms or Saint Hannes cross (related to Swedish sankthanskors, Danish johanneskors, and Finnish hannunvaakuna), as Gorgon loop, and as the command-key symbol due to its use on the command key on Apple computer keyboards.