 The general contractor of the National Stadium was a German-Austrian-Polish consortium led by Alpine Bau and made up of Alpine Bau Deutschland, Alpine Construction Poland, PBG SA and Hydrobudowa Poland SA.The completion date was set for 24 months from the signing of the contract and the construction process involved approximately 1,200 employees.The stadium has a capacity of 58,580 seats for spectators during football matches and up to 72,900 during concerts and other events (including 106 sites for disabled people).