Which Missouri landmark, completed in 1965, is the tallest arch in the world?

The Gateway Arch is the Missouri landmark completed in 1965 and recognized as the world’s tallest arch.

Located on the Mississippi River waterfront in St. Louis, the stainless-steel arch was designed by Finnish-American architect Eero Saarinen. Its form commemorates St. Louis’s historical role as a gateway to the western United States during nineteenth-century expansion.

The arch rises 192 metres, making it as wide at its base as it is high. Its structural form is an inverted catenary, a curve related to the shape formed by a hanging chain. A small tram system carries visitors to an observation area near the top.

The monument is part of Gateway Arch National Park. It is sometimes described as a monument or memorial rather than simply an arch, but “Gateway Arch” is its official name and the standard answer to questions about St. Louis’s famous structure.