The ZCMI Co-Op Building, later known as Glenwood Cooperative Mercantile and Glenwood Mercantile, was erected in 1878 by the United Order Building Board as the retail operation of the Glenwood United Order. It served as the official outlet of ZCMI, Zion's Co-operative Mercantile Institution, part of a co-operative system that began in 1868 and provided retail commodities and services to more than 150 communities. Established in 1874 by The Church of Jesus Christ of Latter-day Saints, the Glenwood United Order required participating members to give over their property in exchange for shares of the corporation, and a committee set both store prices and local wages. The cooperative store was run by Bishop Archibald Oldroyd, president of the Glenwood United Order. By 1882 the Order was discontinued and the store passed into private ownership, though the name Glenwood Cooperative remained in use. In 1898 Neils Heilesen bought the store and operated it until 1910, when he sold it to his son, Henry Edwards Heilesen. The building was remodeled in 1912, when pressed tin pilasters flanking the entrance alcove and a carved wood cornice became part of the new facade, and the name changed to Glenwood Mercantile. The oldest commercial outlet in Sevier County, it was one of the few remaining cooperative stores in Utah built during the United Order movement of the 1870s, and it continued operating as a store until 1952.