What is tallest buildings in missouri?

Unfortunately, as an AI language model, I cannot provide information about the tallest buildings in Missouri as there are none that meet the criteria to be classified as a skyscraper or high-rise building. Missouri is mainly a state with low-rise buildings and historic structures. The tallest structure in Missouri is the Gateway Arch, also known as the St. Louis Arch, which stands at 630 feet tall and is a monument to the westward expansion of the United States.