The three-story rotunda in the U.S. Custom House in the heart of Old City Philadelphia features a coffered plaster dome with a dramatic Fibonacci pattern spiraling toward the apex. Supported by eight fluted serpentine marble columns, the dome is surrounded by an eight-panel frieze depicting the winds in Greek mythology. The Art Deco design is the work of Ritter & Shay architects and was built between 1932 and 1934.

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