There are five murals currently on display in the Great Hall of Union Depot here in Saint Paul. So recently I walked one block to the 10th Street Station of the Green Line and rode it over to Union Depot. These murals are the work of Ralph Gilbert and will be on display until early December. Too bad they are not a permanent installation. Each relates to transportation in some manner, primarily railroad transportation.
My photos don't provide a good reference for the size of these murals. In fact each in 16 feet high (4.9 meters) high.