Fort San Marco. Florida Sterescope Cards Collection, NYPL.

Florida stereoscopic card.

Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who assembled it over a period of more than six decades, Robert N. Dennis (1900-1983).

Stereographs consist of two nearly identical photographs or photomechanical prints, paired to produce the illusion of a single three-dimensional image, usually when viewed through a stereoscope. Stereographs were produced from the 1850s to the 1940s, with the bulk between 1870 and 1920.

florida saint augustine fla castillo de san marcos saint augustine fla forts fortifications saint augustine cannons cannon balls the miriam and ira d wallach division of art prints and photographs photography collection fort san marco forts and fortifications stereoscopic views fort ft marion fort marion castillo de san marcos st augustine san marco robert dennis collection of stereoscopic views old spanish fort ultra high resolution high resolution nypl

1850 - 1930

New York Public Library

https://digitalcollections.nypl.org/

Creative Commons CC0 1.0 Universal Public Domain Dedication ("CCO 1.0 Dedication")