Starting in the 1960s, revitalization efforts began, spearheaded by the LDS Church, who had always considered downtown their home. During the '70s, they built the ZCMI Center Mall on a full city block of land that had previously housed the ZCMI department store, preserving the historic storefront. The Church also leased land to a developer to build Crossroads Mall. The land for the mall originally housed the Amussen Jewelry building (1869), at the time Salt Lake City's oldest building. A study commissioned by the city found it to be Salt Lake City's most architecturally significant building, and efforts to preserve it were underway. However, before the building could be saved, it was torn down to make way for the mall.