The castle on the hill is a water tower

The notched battlement on top — the kind built for archers to duck behind — is the giveaway. From the rising ground east of downtown Kalamazoo, a 175-foot brick tower looks for all the world like the keep of a medieval castle. It is a water tower, and it has been holding water since 1895.

It belongs to the old Kalamazoo State Hospital, which opened in 1859 as the Michigan Asylum for the Insane — the second such institution in the state and, for a while, one of its largest. The campus went up in a heavy, medieval-revival style, all dark brick and pointed massing, the architectural fashion of the day for institutions meant to look permanent and reassuring. When the place needed a proper water supply in the 1890s, Detroit architect William B. Stratton was brought in, and rather than build a plain steel standpipe he wrapped the tanks in a brick tower with that crenellated crown so it would match the brooding buildings around it.

Stratton went on to bigger things — he designed Detroit’s Scarab Club and married the ceramic artist Mary Chase Perry of Pewabic Pottery — but this early tower is one of his more quietly famous works. The water tanks sit hidden behind the curtain wall up top; the thick walls below are mostly there to carry the weight and sell the illusion.

The hospital shrank over the decades and most of the original campus is gone or repurposed now. The tower outlasted it. It is a landmark you cannot pay to climb and cannot easily forget once you have spotted it — a chunk of nineteenth-century Michigan that still keeps an eye on the skyline, looking like it wandered in from a much older country.