Stadion Z'dežele is a football stadium in Celje, Slovenia. It has been the home ground of NK Celje since 2003. Prior to July 2017, the stadium was named Arena Petrol.At the time of its opening, Arena Petrol was the most modern football stadium in the country. It took its name from its principal sponsor, the Slovenian oil company Petrol. The stadium opened on 9 September 2003 with its single stand giving it a capacity of 3,600. Wikipedia