Prague 9 () is a municipal and administrative district of Prague, Czech Republic. Prague 9 administrative districts takes care mainly of districts of VysoÃÂany, Prosek, Hrdloà Âezy, and partly of HloubÃÂtÃÂn, Libeà Â, Stà ÂÃÂà ¾kov a Maleà ¡ice.
The O2 Arena is located in Prague 9 between Libeà  and VysoÃÂany.