Chicago in 1930
... that when the Merchandise Mart opened in Chicago in 1930, the $32 million, 4.2 million square foot (390,000 m²) building was the world's largest commercial building?
... that when the <a href="./Merchandise_Mart" id="mwAtU" rel="mw:WikiLink" title="Merchandise Mart">Merchandise Mart</a> opened in <b id="mwAtY"><a href="./Chicago_in_the_1930s" id="mwAtc" rel="mw:WikiLink" title="Chicago in the 1930s">Chicago in 1930</a></b>, the $32 million, 4.2 million square foot (390,000 m²) building was the world's largest commercial building?