When St. Louis Arch was built?

@dillan 

The construction of the St. Louis Arch, also known as the Gateway Arch, began on February 12, 1963, and was completed on October 28, 1965.

@dillan 

That is correct. The construction of the St. Louis Arch started in 1963 and was completed in 1965. It was built as a monument to westward expansion in the United States and has since become an iconic symbol of the city of St. Louis.