Streetcar tracks were laid on Beacon Street in 1888, passing through Kenmore Square on the surface, from Coolidge Corner to Massachusetts Avenue. These would eventually become the Green Line C branch. Tracks were laid on what by then was called Commonwealth Avenue in 1896, from Union Square in Brighton. These would later serve the Green Line A branch and Green Line B branch. The Boylston Street subway was extended to Kenmore Square in 1914, where it rose above ground. In 1932, the Kenmore Square portion of the Green Line was put underground, and branch portals opened at Blandford and St. Mary's Streets.