How many cells did eastern state penitentiary have?

Eastern State Penitentiary had a total of 450 cells. The prison, which opened in 1829, was designed to house inmates in individual cells for solitary confinement, a practice that was believed to encourage reflection and rehabilitation. The facility was known for its imposing architecture and was one of the first to implement the "Pennsylvania System" of incarceration. It operated until 1971 and is now a historic site.