It looks great :
http://www.stadionwelt.de/stadionwelt_stadien/index.php?template=stadionguides&land=deutschland&stadion=1_fc_koeln&bereich=stadionfotos&tribuene=multimunktional
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What's the capacity of the stadium?
Phil Collins had about 50.000 people in there last year (or 2003, cannot remember).