Photographs belonging to Richard Thomas Cullen mostly of telescopes at the Royal Observatory, Greenwich.

Photographs of Royal Observatory, Greenwich including photograph of the Illustrated London News 21 April 1923 article on Transit Telescope; Photograph of the South building formally known as the New Physical Building before 1900; two photographs taken in the Thompson Dome one photograph of the 30 inch photographic reflector taken about 1930 at Greenwich; the 26 inch photographic refractor at Greenwich about 1925 showing the Merz 12.8 inch refractor in a steel tube mounted as guiding telescope above the main tube, the Thompson 9 inch Photoheliograph is mounted below and the 30 inch reflector was mounted as counterpoise off to the left and one photograph of the Osler Anemometer in the North West Turret on Flamstead House from 1890 to 1953, in the photograph the Pluviometer (recording rain gauge) is on the left.

Richard Thomas Cullen (1886-1972) joined the Royal Observatory, Greenwich, as a supernumerary computer in March 1901 and worked through several grades to become Principal Scientific Officer of the Meridian Department, making numerous observations with the Airy Transit Circle. He retired in 1950.