The 500 Block of Main Street
Here, in a 1931 insurance map photographed by Michelle Gerdes at the Los Angeles Public Library (it's not been digitized) we get the west side of the block with the Art Theatre (551 S. Main St.), the Optic Theatre (533 S. Main St.), the Star Theatre (529 S. Main St.), and the Gayety Theatre (523 S. Main St.).
There's a new page started just for maps of the downtown theatres as the collection promises to grow. Michelle is still at work! Also see our Main Street Theatres page for the rundown on more than 40 additional theatres.