The Gateway Arch Facebook page posted: Whether you are flying high in the sky or see the Gateway Arch shining in the night, you can’t miss the bright red beacon atop the monument, but do you know the man behind the light? Allow us to introduce you to Silas Garrett, the African American United States Army Engineer who petitioned the City of St. Louis to add a light. Garrett, a former pilot, knew the importance of having a guiding light at the top of the Gateway Arch, given the height and shape. Not only did he petition for the light he also built the light. After the installation, he would return more than 25 times for updates, upgrades, and routine maintenance.