Camp Nou, "new field", often referred to as the "Nou Camp" in English is the home stadium of FC Barcelona since its completion in 1957. With a seating capacity of 99,354, it is the largest stadium in Spain and Europe, and the second largest association football stadium in the world in terms of capacity. It has hosted two European Cup/Champions League finals in 1989 and 1999, five matches including the opening game of the 1982 FIFA World Cup and the football competition final at the 1992 Summer Olympics.

The stadium’s capacity has varied greatly over the years, opening at 106,146, but growing to 121,749 for the 1982 FIFA World Cup.

In January 2014, Barcelona's board of directors rejected the option of building a new stadium and will instead remodel the Camp Nou to bring the capacity up to 105,000. The project is expected to cost around £495 million (€600 million) with work beginning in 2017 with a completion date of early 2021. A refinement of the plan was released on 26 May 2015, showing plans to add a canopy over the stands, and showing the plans for seating expansion in greater detail.

Wembley Stadium has a capacity of 90,000.

Croke Park has a capacity of 82,300.

Santiago Bernabéu Stadium has a capacity of 80,044.

More Info: en.wikipedia.org