From a Wikipedia article on Glenwood, Iowa:
"In 1876 the State Veteran's Orphan's Home at Glenwood became the Iowa Asylum for Feeble-Minded Children, the 7th such facility in the country and the first located west of the Mississippi River. The Glenwood facility expanded greatly with the treatment of mental retardation and acceptance of eugenics and became the Iowa Institution for Feeble-Minded Children.....The institution has long dominated Glenwood both economically and culturally although the IIFMC was self-sufficient and the residents were intentionally isolated from the rest of the town. By 1925 the Glenwood IIFMC was the home of 1,555 inmates categorized between idiots, imbeciles, and morons. The IIFMC became the Glenwood State-Hospital School in 1941 and during the early 1950s covered 1,185 acres (5 km2) with 310 staff members responsible for the 1,968 patients who were subjected to state-mandated sterilization and experiments. Deinstitutionalization of Glenwood began in the late 1950s.....The transformation from traditional ward buildings into group home styled cottages was largely completed during the 1970s. The facility is now known as the Glenwood Resource Center."

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NOTE AND PICTURE (below):

"In 1876, the State Veteran's Orphan's Home at Glenwood became the Iowa Asylum for Feeble-Minded Children." Below is some kind of a declaration of the intentions of the newly-named institution, probably written in 1876. But don't forget that Mary wouldn't have been brought here to live until the very early 1900s, about a quarter of a century later than this was published: