The most neglected masterpiece ever!  As an example of Baroque religious music, I believe it surpasses Pergolesi's stabat mater, Vivaldi's Gloria, and Bach's cantatas.  One beautiful aria follows another.  It really is an embarassment of riches.  It baffles me why this work is so little known.  Perhaps Rene Jacobs flawless recording will change that.  Incidentally, after I heard this I went out and bought 5 other Caldara CDs and while they all have their merits none of them came close to this one.