A courtyard window at Eastern State Penitentiary in Philadelphia Pennsylvania.  The prison was built in 1829 and closed in 1971.  

Technical details:
Sakai Toyo 5x7" large format metal field camera with 4x5" film back.
150mm Caltar-S II F 5.6 lens in Copal BT shutter.
Kodak Ektascan BR/A single-sided X-Ray film shot at ISO 100.
Exposure was 1/8 second at F22.
Developed in Rodinal/Adox Adonal 1:150 dilution for 7 minutes @ 20 degrees Celsius in Mod54 daylight developing tank.  
4x5" negative scanned with Epson V600.