Blackwell Hall
... that until the 19th century, Blackwell Hall in the City of London controlled England's main commercial activity—the cloth trade?
... that until the 19th century, <b id="mwCcA"><a href="./Blackwell_Hall" id="mwCcE" rel="mw:WikiLink" title="Blackwell Hall">Blackwell Hall</a></b> in the <a href="./City_of_London" id="mwCcI" rel="mw:WikiLink" title="City of London">City of London</a> controlled England's main commercial activity<span id="mwCcM" typeof="mw:Entity">—</span>the cloth trade?