 In 1991 it merged with the "Internationales Burgen Institut" (the International Castles Institute), itself created in 1949.Today, Europa Nostra is presided over by world-renowned opera singer Maestro Plácido Domingo (Spain), and its Executive President is Denis de Kergorlay (France).Previous presidents have been the Infanta Doña Pilar de Borbón from Spain (2007–2009), the Prince Consort of Denmark (1990–2007) and Hans de Koster from the Netherlands (1984–1990).