Old Newgate Prison

Also known as: Newgate Prison and Copper Mine, Simsbury Mine
Newgate Rd., East Granby, Connecticut


Street Views 


Used from 1775 to 1782 as a prison for British soldiers, Tories and other political offenders, New-Gate Prison was undoubtedly the most horrible prison in the British North American Colonies: Revolutionary War prisoners were incarcerated deep underground in the tunnels of the Copper Hill Mines. After 1776, New-Gate also served as Connecticut's first State Prison; it was abandoned in 1827. -- National Historic Landmark statement of significance, November 28, 1972

National Register information 

Posted to the National Register of Historic Places on October 15, 1970
Reference number
Areas of significance
Military; Politics/Government; Social History
Level of significance
Evaluation criteria
A - Event
Property type
Historic function
Correctional facility
Current function
Periods of significance
1800-1824; 1750-1799; 1825-1849
Significant years
1775; 1827
Number of properties
Contributing structures: 5
Contributing sites: 1

Update Log 

  • October 26, 2017: New Street View added by Brian Bartlett