Corn Uí Mhuirí is the cup presented to the winners of the Munster colleges senior "A" football championship, the top level Gaelic football championship for secondary schools in Munster. The winners advance to the Hogan Cup, which is the All-Ireland colleges senior "A" football championship. The competition begins with a round-robin system of four groups of three teams. The top two teams in each group advance to the knock-out stage. The competition was established in 1927 by Dr. Eamon O'Sullivan and Canon Breen at a meeting in Mallow.