The Ellis Island Registry Room was originally constructed in 1900 by architects Boring and Tilton with a plaster ceiling, and was reconstructed with a beautiful tile ceiling by the Guastavino Company in 1917; literally becoming a palace for the people of sorts, where millions of immigrants passed through. However, the vaulting wasn't just stunning, it was also structurally stable. When Ellis Island was abandoned for decades and its buildings fell into terrible disrepair, the Guastavino vault remained completely intact. Photo © Michael Freeman. Courtesy of the Museum of the City of New York