Slide 1 of 11,

CITY HALL SUBWAY STATION "One of the most glorious examples — and very few people see it," said John A. Ochsendorf, director of the Guastavino Project at M.I.T. The station is still used as a loop turnaround by southbound No. 6 trains. What distinguishes this project, Professor Ochsendorf said, are the decorative polychromatic tiles and the remarkable geometry of the vaults, which are curved in every direction, since the platform takes the shape of a gentle arc. On the death of Rafael Guastavino y Moreno in 1908, four years after the subway opened, this station was considered so important that The New York Times described Guastavino in its headline like this: "Architect Who Devised the Arch Used in the Subway."