A Square with Unequal Sides

This is Powderhouse Square. It is named after this munitions depot that the British maintained and which the colonists seized during the revolution.

It is also a very large traffic rotary and is called a "square"! Get it?? In Massachusetts any traffic intersection that is a rotary, or a triangle, or a trapazoid, can be called a "square". Got it?? I think that in order to attain the status of a "square" that this has to be a dangerous intersection and you are "squaring" off against the road.