The Centre Street Loop got its start in 1908 with the Brooklyn Rapid Transit Company's first Manhattan subway track: the terminal at the foot of the Williamsburg Bridge. The Loop was the first of two BMT Brooklyn Loops designed to connect various Brooklyn Subway lines without requiring new and inefficient terminals in lower Manhattan. Under its original design, the Loop would connect the tracks of Broadway Elevated coming over the Williamsburg (now the BMT Jamaica Line) with Brooklyn Bridge trains originating in Brooklyn. The loop was never completed as planned and was instead incorporated into the BMT Nassau Street Line. These photos document the construction of the tracks that today carry the J and Z trains, and capture glimpses of Manhattan's Civic Center before the completion of the Municipal Building and other prominent structures around Foley Square and City Hall Park.

“Delancey St. - Williamsburg Bridge. \[Delancey Street Looking East from Near Ludlow St.]” Dated 1905, this photo shows the Delancey Street approach to the Williamsburg Bridge under construction. The carriageway, streetcar tracks, and the Brooklyn Rapid Transit subway tracks (also under construction) are visible at the foot of the bridge, though the span itself is barely visible through the East River haze.