Moscow Triumphal Gate
...that, at the time of its construction in 1838, the Moscow Triumphal Gate in Saint Petersburg was the largest cast-iron structure in the world?
...that, at the time of its construction in <a href="./1838" id="mwBlE" rel="mw:WikiLink" title="1838">1838</a>, the <b id="mwBlI"><a class="mw-redirect" href="./Moscow_Triumphal_Gates" id="mwBlM" rel="mw:WikiLink" title="Moscow Triumphal Gates">Moscow Triumphal Gate</a></b> in <a href="./Saint_Petersburg" id="mwBlQ" rel="mw:WikiLink" title="Saint Petersburg">Saint Petersburg</a> was the largest <a class="mw-redirect" href="./Cast-iron" id="mwBlU" rel="mw:WikiLink" title="Cast-iron">cast-iron</a> structure in the world?