Picryl description: Public domain image of San Francisco earthquake and Great Fire, 1906, free to use, no copyright restrictions image.
Picryl description: Public domain image from Robert Dennis collection of stereoscopic prints, free to use, no copyright restrictions.
Picryl description: Public domain image of a historical building, landmark architecture, world heritage, free to use, no copyright restrictions.
California 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 a More