Under the terms of a public-private partnership contract including finance, design, construction and operation, Bouygues Bâtiment International was responsible for the Budapest Arena. This fully modular, 40,000 m² venue, opened in 2002, can seat up to 15,000 people, and hosts major events of all kinds. It is elliptically shaped, and boasts particularly high-quality acoustics, with an echo of 3 seconds (compared to 7 seconds at Paris-Bercy).