Gatehouse Prison in the 18th century
The Crimean War Memorial, on the site of the Gatehouse in front of Westminster Abbey

Prison in Westminster, built in 1370 as the gatehouse of Westminster Abbey.

Gatehouse Prison in the 18th century
Cargill Pool grain elevator, Buffalo, New York

Historic grain elevator in Baker, Oklahoma.

Cargill Pool grain elevator, Buffalo, New York

Slovak slalom canoeist who competed at the international level from 1993 to 2007.

Territory of the Delhi Mamluk Dynasty.

Officer of the Mamluk Sultanate of Delhi.

Territory of the Delhi Mamluk Dynasty.

A doubles specialist.

Irish Fine Gael politician who has been a Teachta Dála (TD) for the Louth constituency since the 2002 general election.

North American species of flowering plants in the family Asteraceae known by the common name elegant aster.

Ghanaian businesswoman and pioneer of microlending, a programme of making small loans in order to stimulate businesses.

A home-made pinhole camera lens
A diagram depicting Ibn al-Haytham's observations of light's behaviour through a pinhole
Early pinhole camera. Light enters a dark box through a small hole and creates an inverted image on the wall opposite the hole.
A home-made pinhole camera (on the left), wrapped in black plastic to prevent light leaks, and related developing supplies
A graph of the resolution limit of the pinhole camera as a function of focal length (image distance).
A fire hydrant photographed by a pinhole camera made from a shoe box, exposed on photographic paper to create the negative image (top). The positive image (bottom) was created digitally from the negative image. The length of the exposure was 40 seconds. There is noticeable flaring in the bottom-right corner of the image, likely due to extraneous light entering the camera box.
Replica images of a partial solar eclipse.

Simple camera without a lens but with a tiny aperture —effectively a light-proof box with a small hole in one side.

A home-made pinhole camera lens
Nixon and Presley in the Oval Office on December 21, 1970. The meeting was kept secret until Jan. 27, 1972, when The Washington Post broke the story. Copies of this photo are requested from the National Archives more than any other image.

1997 Canadian-American mockumentary film directed by Allan Arkush and starring Rick Peters, Bob Gunton, and Alyson Court.