St Patrick: What do we know about the man behind the day?

On March 17 we Irish celebrate the deeds of St Patrick, but just how much do we actually know about the man behind the day, asks Kevin O’Brien?

This year, once again, Saint Patrick’s Day will be celebrated all over the world.

Government ministers will fly to far flung corners of the globe to give a bowl of the old trifolium dubium to global dignitaries.