Featured Collections
Photographs that visually document the people and landscape of the San Francisco Bay Area during a time of enormous social, political, and environmental change.
Explore this collectionDigitized hand-painted lantern slides that document DeCou's travels in five continents and subsequent travel lecture tours ca. 1920-1941.
Explore this collectionDigitized glass negatives and photographs documenting the building of the Observatory along with portraits of scientists, Observatory personnel; images of instruments and celestial objects and events.
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