Caption: "Portals of the Past," c. 1915. A monument in Golden Gate Park in San Francisco, on the shores of Lloyd Lake, consisting of a white marble archway and columns. The archway was originally part of the Nob Hill mansion belonging to railroad tycoon Alban Towne. The mansion was destroyed in the 1906 San Francisco earthquake and fire, but the entryway still stood. It was moved to the shore of Lloyd Lake in 1909, as a memorial to the pre-1906 city.