In what year was the team founded that won the 1956-1957 Irish League championship?
Glenavon F.C. Glenavon Football Club is a semi-professional, Northern Irish football club playing in the NIFL Premiership. The club, founded in 1889, hails from Lurgan and plays its home matches at Mourneview Park. Club colours are blue and white. Gary Hamilton has been player-manager of the Lurgan Blues since December 2011 following the resignation of Marty Quinn.
Northern Ireland national football team The Northern Ireland national football team represents Northern Ireland in international association football. From 1882 to 1921 all of Ireland was represented by a single side, the Ireland national football team, organised by the Irish Football Association (IFA). In 1921, the jurisdiction of the IFA was reduced to Northern Ireland following the secession of clubs in the soon-to-be Irish Free State, although its team remained the national team for all of Ireland until 1950, and used the name "Ireland" until the 1970s. The Football Association of Ireland (FAI) organises the separate Republic of Ireland national football team.