"The Temple" is a short story written by H. P. Lovecraft in 1920, and first published in the pulp magazine Weird Tales #24 in September 1925.
The story is narrated as a "found manuscript" penned by Karl Heinrich, Graf von Altberg-Ehrenstein, a lieutenant-commander in the Imperial German Navy during the days of World War I. Altberg begins by declaring that he has decided to document the events leading up to his untimely end in order to "set certain facts" before the public, aware that he will not survive to do so himself.
In the North Atlantic, after sinking a British freighter and its occupied lifeboats, the cruel and arrogant Altberg commands his U-boat to submerge, surfacing later to find the dead body of a seaman who died clinging to the exterior railing of the sub. A search of the body reveals a strange piece of carved ivory. Because of its apparent great age and value, one of Altberg's officers keeps the object, and shortly thereafter, strange phenomena begin to occur - such as the dead man apparently swimming away rather than sinking...