Great Central Station
... that on its 1856 opening, the Illinois Central Railroad's Great Central Station was the largest building in Chicago?
... that on its 1856 opening, the <a href="./Illinois_Central_Railroad" id="mwA88" rel="mw:WikiLink" title="Illinois Central Railroad">Illinois Central Railroad</a>'s <b id="mwA9A"><a href="./Great_Central_Station" id="mwA9E" rel="mw:WikiLink" title="Great Central Station">Great Central Station</a></b> was the largest building in <a href="./Chicago" id="mwA9I" rel="mw:WikiLink" title="Chicago">Chicago</a>?