I seem to recall reading somewhere that the Mass in C minor of Mozart is one of his favourite pieces - it's one of mine too (last count I have about 9 recordings). So enjoy this performance of the work - Sir John Eliot Gardiner conducting the Monteverdi Choir and the Royal Stockholm Philharmonic Orchestra.
And here is a video of the choir formerly conducted by his brother, the Regensburger Domspatzen - they're singing the wonderful motet for Maundy Thursday by Lassus - Tristis est anima mea.
