Designations: Local, State and National Register of Historic Places. Listed separately as a National Historic Landmark and on the top 11 most endangered buildings list of the National Trust for Historic Preservation.
Site Acreage: 122 Acres

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Main Structure: 123,301 square feet.

Year of Construction: 1858

Description: 3-story, Gothic Revival Style limestone structure

Dimensions: 350 feet in length by 50-75 feet deep

Outstanding Features: Castle-like exterior appearance. Hand carved interior staircases in the central entry area, ornate director's office, two-story chapel, large meeting rooms at the end of each wing, tin ceilings and numerous patient rooms that have been converted to office areas.

Average Ceiling Height: 15-18 feet

Roof: Flat, extensive replacement in 1998
Bandstand: Turn of the Century, Victorian style, wood frame construction. Located on the north side of the main structure.
Bell Pavilion: Small wood-frame structure, located on the west lawn, houses the original asylum bell.