The Katyń Museum / BBGK Architekci

In recent years, the area of the 19th-century Warsaw Citadel in Warsaw, Poland, has been undergoing a transformation into a museum complex and memorial site that is unique on a European scale. The historic area, which remained closed to the city for years, is now becoming a representative space commemorating the history of Poland. This is one of the largest public developments among the numerous cultural investments following Poland's accession to the European Union in 2004.