Calakmul
... that Calakmul was one of the largest and most powerful Maya cities?
... that <b id="mwArk"><a href="./Calakmul" id="mwAro" rel="mw:WikiLink" title="Calakmul">Calakmul</a></b> <i id="mwArs">(pictured)</i> was one of the largest and most powerful <a href="./Maya_civilization" id="mwArw" rel="mw:WikiLink" title="Maya civilization">Maya</a> cities?