Great Fire of Pittsburgh
... that the Great Fire of Pittsburgh in 1845 destroyed a third of the city, including a bank that was thought to be fireproof?
... that the <b id="mwDh8"><a href="./Great_Fire_of_Pittsburgh" id="mwDiA" rel="mw:WikiLink" title="Great Fire of Pittsburgh">Great Fire of Pittsburgh</a></b> in 1845 destroyed a third of the city, including a bank that was thought to be fireproof?