Colorado Territorial Correctional Facility (CTCF), colloquially known simply as "Territorial," is a medium security prison in Cañon City, Colorado. CTCF is the oldest prison in the Colorado DOC system. It was built in 1871 as a territorial prison and became a state prison in 1876. The Colorado DOC system only has two infirmaries, one of which is located in CTCF. The other is located in the Denver Reception & Diagnostic Center (DRDC).