Finnish-American architect Eero Saarinen designed the Gateway Arch monument, completed in St. Louis in 1965 (it opened to the public in 1967). The world's largest arch, the iconic, 632-foot tall structure was built as a monument to westward expansion in the United States. Here, he's shown alongside models of the arch.
Credit: Yale University Library, Manuscripts and Archives; © St. Louis Post-Dispatch
