To provide you with additional information about how we collect and use your personal data, we’ve recently updated our Privacy Policy and Terms of Service. Please review these pages now, as they apply to your continued use of our website.
Gateway Arch In Downtown, St Louis Missouri. The Gateway Arch Is A 630-Foot (192 M) Monument In St. Louis In The U. S. State Of Missouri. Clad In Stainless Steel And Built In The Form Of An Inverted, Weighted Catenary Arch, [5] It Is The World's Tallest Arch, [4] The Tallest Man-Made Monument In The Western Hemisphere, [6] And Missouri's Tallest Accessible Building. Built As A Monument To The Westward Expansion Of The United States, [5] It Is The Centerpiece Of The Jefferson National Expansion Memorial And Has Become An Internationally Famous Symbol Of St. Louis.