The largest structure at the Dwight D.Eisenhower Farm in the National Military Park in Gettysburg, Pennsylvania, was the main barn. This had perhaps held cows, livestock and crops in years past. It has a lot of the structure of the typical Pennsylvania barn with a stone base, metal roof and three cupulas vented for air. There are lots of windows on the 4+ story structure. It also was overhung in the back with a filled in portion made later.