In what year was the team founded that won the 1956-1957 Irish League championship?
1956–57 Irish League The Irish League in season 1956–57 comprised 12 teams, and Glenavon won the championship.
Kilshannig GAA Kilshannig is a Gaelic Athletic Association club based in the parish of Glantane in County Cork, Ireland. The parish in North Cork is split into three villages, Glantane, Dromahane and Bweeng. The club was founded in the same year as GAA's founding, in 1884. Cill Seannaigh comes from St. Senach, who founded a church near the present site of the Church of Ireland at Newberry. The club fields Gaelic football and hurling teams in competitions organized by Cork county board, and by the Avondhu division.