Church of the Holy Apostles
... that until it was looted in 1204 during the Fourth Crusade, the Church of the Holy Apostles was the busiest place of worship in Constantinople?
... that until it was <a href="./Looting" id="mwAaw" rel="mw:WikiLink" title="Looting">looted</a> in <a href="./1204" id="mwAa0" rel="mw:WikiLink" title="1204">1204</a> during the <a href="./Fourth_Crusade" id="mwAa4" rel="mw:WikiLink" title="Fourth Crusade">Fourth Crusade</a>, the <b id="mwAa8"><a href="./Church_of_the_Holy_Apostles" id="mwAbA" rel="mw:WikiLink" title="Church of the Holy Apostles">Church of the Holy Apostles</a></b> was the busiest <a href="./Place_of_worship" id="mwAbE" rel="mw:WikiLink" title="Place of worship">place of worship</a> in <a href="./Constantinople" id="mwAbI" rel="mw:WikiLink" title="Constantinople">Constantinople</a>?