any modernization work besides installing new plastic chairs in the early '90s. In this stadium Lech Poznan began its "golden age". In the 1980s and 1990s, Lech won six league titles (1983, 1984, 1990, 1992, 1993, 2010), five Polish Cups (1982, 1984, 1988, 2004, 2009) and four Polish SuperCup (1990, 1992, 2004, 2009). Reconstruction Process of complete reconstruction of the stadium began in mid-2003. The first stage of works was to complete the missing stand. The new North stand “completed” the characteristic U-shaped construction style of the stadium and increased its capacity by an additional 8,124 seats. The stand was opened in March 2004. Almost two years later, the roof construction covering all seats on north stand was built. At the same time the stadium was equipped with an under-soil heating system. Also floodlights mast modernization took place in the same year. In January 2006, construction of stands no. II (South stand) began in place of demolished old stadium’s sections occupied by the Lech Poznań supporters section. This part of the stadium was traditionally called “Kocioł” (Polish “Boiler”). The construction of first two storeys of this 3-level stand were completed in February 2007, with work on the third one finalized in September 2008. This resulted in the increase in capacity of the entire stand to about 9,000 seats. After Poland was chosen as a co-hosting Nation for Euro 2012 the city authorities decided to revise the architectural concept of the stadium and thus a larger facility was decided to be built. The stadium capacity increased to about 45,000 seats. According to a new project stands no. I and III (along sidelines) were built as two-level constructions. Both have capacity for 13,750 spectators. VIP lounges, media zone, locker rooms, referees rooms and club facilities are located on the stand no. I. Whole seats located on stand no. III are dedicated strictly for football fans. All places on the stadium are seated – folding stadium seats are installed in such a way as to maintain a minimum 12 cm clearance between each other. Modernization and expansion project of the stadium was delivered by Modern Construction Systems. In comparison to the earlier architectural concepts, the last one changed the roof construction design. The concept introduced roof as a membrane in natural colors of silk. The whole membrane is divided into equal segments – each of them is 9 meters long and gives the