The mall was designed and built by "Triple Five Group", owned by the Ghermezian brothers of Canada, who also own the biggest shopping mall in North America, the West Edmonton Mall. Mall of America is on the past site of Metropolitan Stadium, where the Minnesota Vikings and Minnesota Twins played until the Hubert H. Humphrey Metrodome opened. The teams left Metropolitan Stadium in 1982. A plaque in the amusement park is where home plate used to be in that stadium. One seat from Met Stadium was placed in Mall of America at its exact location (including elevation) in the stadium, to recognize a 520 foot home run hit by hall-of-famer Harmon Killebrew on June 3, 1967.