Without a doubt, this is Vicksburg's most historic building. An exceptional collection of artifacts and a self-guided tour help tell Vicksburg's story in this National Landmark structure. Be sure to allow plenty of time to see this fascinating collection. The Old Court House Museum is open from 8:30 a.m. to 4:30 p.m. Monday through Saturday and from 1:30 p.m. until 5:00 p.m. on Sunday.