 The Mess Hall/Library/Deanes Castle Dormitory (also known as The Roller House) was built in 1879 as the residence for founder Charles Summerville Roller.It is the two-story, double-pile, frame building sheathed in German siding and covered by a hipped, slate shingle roof.It is the only original structure remaining and was rebuilt/remodeled in 1999, today serving as the AMA Museum.