Temple Sinai

Temple Sinai is a Reform Jewish congregation and synagogue located at 2808 Summit Street in Oakland, California, in the United States. Founded in 1875, it is the oldest Jewish congregation in the East San Francisco Bay region.

Its early members included Gertrude Stein and Judah Leon Magnes, who studied at Temple Sinai's Sabbath school, and Ray Frank, who taught them. Originally traditional, the temple reformed its beliefs and practices under the leadership of Rabbi Marcus Friedlander. By 1914, it had become a Classical Reform congregation. That year the current sanctuary was built: a Beaux-Arts structure designed by G. Albert Lansburgh, which is the oldest synagogue building in Oakland.