The 11:15 mass on St Patrick's Day, 17 March 2011, will be sung jointly by the Cathedral Choir and the choir of St Nicholas' Collegiate Church.
Music to be sung will include Victoria's Missa O quam gloriosum, as well as the motet O quam gloriosum upon which the mass setting is based.
The two choirs have collaborated several times in the past, most recently at an evensong in St Nicholas' Church for the feast of St Nicholas on 6 December last.
Full details of masses on the Cathedral for St Patrick's Day are available here.