Listen to Caislean An Oir/The New Century online. Caislean An Oir/The New Century is an English language song and is sung by Matt Molloy and Sean Keane. Caislean An Oir/The New Century, from the album Contentment Is Wealth, was released in the year 2006. The duration of the song is 3:09. Download English songs online from JioSaavn.