From the plaque:
On this site on January 18,
1869, the California Theatre, built by William C. Ralston,
opened with the following stock company: John McCullough,
Lawrence Barrett, Harry Edwards, Willie Edouin, E. B.
Holmes, William Mastayer, John T. Raymond, W. F. Burroughs,
W. H. Sadley Smith, John Wilson, Edward J. Buckley, Mrs.
Judah Emelie Melville, Elizabeth Saunders, Annette Ince,
Marie E. Gordon, Sophie Edwin, Minnie Walton, and Julia
Buckley. This theater remained a brilliant
center of drama until August 11, 1888. Among artists who played here were Charles W.
Couldock, Edwin Adams, John Broughan, Edwin Booth, Barton
Hill, Walter Montgomery, Mrs. D. P. Bowers, Adelaide Neilson,
and Lotta Crabtree.
Tablet placed by the Commonwealth Club of California and the Pacific Telephone and Telegraph Company - 1932.