An escape from the darkness

Hallway window at Eastern State Penitentiary in Philadelphia Pennsylvania.  Built in 1829 and closed in 1971 remaining abandoned for several decades before being re-opened to the public as a tourable historical attraction. 

Technical details:
Bronica SQ-A medium format film camera with a Bronica Zenzanon 80mm PS lens.  
Kodak Tmax 400 shot at ISO 400.
Exposure not written down. 
Developed in Pyrocat HD at 1:1:100 dilution for 15 minutes @ 20 degrees Celsius in Paterson 3 reel tank.  30 seconds initial inversions followed by 5 seconds of inversions every 30 seconds. 
Negative scanned with Epson V600.

A bit of a nightmarish exposure situation but I like a good challenge and film's dynamic range and Pyrocat HD's ability to preserve highlight detail gave me a highly usable negative.  A little dodging and burning finished it off.