Prague 9 is both a municipal and an administrative district in Prague, Czech Republic. Prague 9 administrative districts takes care mainly of districts of Vysočany, Prosek, Hrdlořezy, and partly of Hloubětín, Libeň, Střížkov a Malešice. O2_Arena_(Prague) is located in Prague 9 on the edge of Libeň and Vysočany districts. See also Districts of Prague#Symbols References External links Prague 9 - Official homepage Districts of Prague