Black Hole of Calcutta, a confined apartment 13 ft. square, into which 146 English prisoners were crammed by the orders of Surajah Dowia on the 19th June 1756; their sufferings were excruciating, and only 23 survived till morning.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Black Friars * Black Lands