Drogheda in county Louth is celebrating Oliver 400 - the 400th anniversary of the birth of their very own saint, Oliver Plunkett. It's unusual to have a saint with a surname as well as Christian name. Then again it's unusual to have a relic of someone's head. Oliver Plunkett was born in 1625, became archbishop of Armagh, and was brutally hung drawn and quartered. His mummified head is kept in St Peter's church. He was made a saint in 1975 and the church is in the process of building a new shrine