The club was for a time known as FC Den Haag with ADO representing the amateur branch of the club. Despite being from one of the traditional large Dutch cities, it has not been able to match Ajax, Feyenoord or PSV in terms of succes in the Eredivisie or in European competition. The words Alles Door Oefening (ADO) translate into Everything Through Practice in Dutch. Den Haag were twice league champions in the amateur era. ADO who are based in the Dutch residence city The Hague were coached by Ernst Happel when they won the 1968 Cup against Ajax, their first professional trophy. There is a big rivalry with the clubs Ajax and Feyenoord. ADO supporters have strong links with Welsh club Swansea City. Flags of the the respective clubs are often flown at the matches of the other club, and both clubs regularly hold pre-season friendly matches. Legia Warsaw (Poland), Club Brugge (Belgium) and Juventus (Italy) also share strong supporter links with ADO Den Haag. Known is the so-called “Haags Kwartiertje” (The Hague Quarter), a period late in the second half of home games in which ADO Den Haag, whipped up by a screaming and singing audience, tries to come back from behind or to score the winning goal in a tie. The ADO Den Haag logo contains the club green and yellow. Central to this logo is the stork, the bird that is also the symbol of the city of The Hague.