Monadnock Building
... that the staircases in the 1891 Monadnock Building in Chicago were the first use of aluminum in a building?
... that the staircases in the 1891 <b id="mwC-8"><a href="./Monadnock_Building" id="mwC_A" rel="mw:WikiLink" title="Monadnock Building">Monadnock Building</a></b> in <a href="./Chicago" id="mwC_E" rel="mw:WikiLink" title="Chicago">Chicago</a> <i id="mwC_I">(pictured)</i> were the first use of <a class="mw-redirect" href="./Aluminum" id="mwC_M" rel="mw:WikiLink" title="Aluminum">aluminum</a> in a building?