Kaftanzoglio Stadium
It currently has 27 , 770 seats , owing to a comprehensive renovation before reopening to host football matches for the 2004 Summer Olympics , which was centered in Athens . 
<triplet> football <subj> 2004 Summer Olympics <obj> part of <subj> 2004 <obj> point in time <triplet> 2004 Summer Olympics <subj> football <obj> has part <subj> 2004 <obj> point in time <subj> Athens <obj> location