Calisphere: Gateway to California’s digital collectionsCalisphere provides free access to unique and historically important artifacts for research, teaching, and curious exploration. Discover over 925,000 photographs, documents, letters, artwork, diaries, Collections on Calisphere have been digitized and contributed by all ten campuses of the University of California and other important libraries, archives, and museums throughout the state.oral histories, films, advertisements, musical recordings, and more.