• Looking up at the Gateway Arch

    Jefferson

    National Expansion Memorial Missouri

Mathematical Equation

Mathematical equation that lies behind the construction of the Gateway Arch.
The mathematical equation that lies behind the construction of the Gateway Arch.

Did You Know?

Cast iron fence outside the Old Courthouse, part of the Jefferson National Expansion Memorial

During the 19th Century St. Louis was the premier ironwork city. After the great fire, many of its buildings were made using iron framework topped off by beautiful iron ornamentation. Jefferson National Expansion Memorial showcases St. Louis architecture in the Old Courthouse. More...