Logan Circle (Square) in Philadelphia

From Wikipedia.

Logan Circle is also known as Logan Square.  The circle aspect of it is entirely within the boundaries of the old square.  Logan Square is where the Great Central Fair was held in 1864, which I have been writing about.

It was originally known as Northwest Square in William Penn's 1684 plans for the city.  It was renamed in 1825 after Philadelphia's James Logan (1684-1751), the 14th mayor, Chief Justice of Pennsylvania, lieutenant governor and acting governor.  He was an avid collector of books, eventually amassing 3,000 of them, which he described as "my disease."

During the American Revolution it was essentially a forest.  Over the next 25 years it served as a pasture, cemetery and execution ground.  In 1823, it was the site of the hanging of William Gross, the last person publicly executed in the city.

--Old Secesh