Suburra

Suburra (usually spelled Subura in antiquity) is an area of the city of Rome, Italy. In ancient Roman times, it was a crowded lower-class area that was also notorious as a red-light district. It lies in the dip between the southern end of the Viminal and the western end of the Esquiline hills. Most of its inhabitants lived in insulae, tall apartment buildings with tabernae on the ground floor.

• http://en.wikipedia.org/wiki/Suburra
• Page 23 - Holland, T., 2003, Rubicon: The Last Years of the Roman Republic: Anchor Books, New York, 408p.