Since the late 1920s, the “E”-shaped Croydon, an eight-story apartment building with two four-story north and south wings, has formed a backdrop for the athletic field at 48th and Spruce streets. Facing S. 49th Street between Spruce and Locust, the Croydon has a checkered past. By the turn of the Millennium, the once-thriving 127-unit edifice stood shuttered, crumbling, and in tax arrears. Known in counter-cultural circles as “Paradise City,” the abandoned building attracted hobo-like squatters, some brandishing guard dogs, from around the country. In recent years, Orens Brothers Real Estate, Inc., a Center City firm, has renovated the once-decaying complex and offers upgraded 1- and 2-bedroom rental units.