This is the gregorian chant antiphon ‘Caritas Pater est’. Listen to it while watching the same in the original manuscript (B-Gu Ms15/1), which is a late fifteenth century antiphoner from Ghent, Belgium. There is also some footage of chant group Psallentes (founded and directed by Hendrik Vanden Abeele) preparing for a photoshoot at Park Abdij, Heverlee. The bearded singer is Conor Biggs. Other singers on show are Lieven Deroo, Philippe Souvagie and Paul Schils.