The site of the Black Hole of Calcutta on the Eastern side of Dalhousie Square. The inscription on the plaque reads: 'The marble pavement below this spot was placed here by Lord Curzon, Viceroy and Governor-General of India in 1901, to mark the site of the prison in Old Fort William known as the Black Hole in which 146 British inhabitants of Calcutta were confined on the night of 20th June 1756, and from which only 26 came out alive.' The memorial no longer exists.

For an account of the events of that night go to Glossary A-M.