Kabletown

They're taking over.

Liberty Property Trust has been quietly assembling a series of properties at 19th and Arch streets in Center City for what many speculate could be the site of the third skyscraper for Comcast Corp.

Liberty is pursuing what could eventually amount to a block bound by 19th, Arch, Cherry and 20th streets. The location is cater-corner to where Liberty (NYSE: LPT) is developing the Comcast Innovation & Technology Center and is a stone's throw from the Comcast Center. Another tower in that area would establish an expanded urban campus for the cable giant and continue to push the city's Central Business District deeper into Logan Square.