Claudio Monteverdi's Nisi Dominus

Monteverdi was probably the most important composer in the transition from Renaissance Polyphony to Baroque.  This beautiful piece from his his Vespro della Beata Vergine is a musical setting for Psalm 127, one of my favorites, which celebrates our reliance on God's Providence (you can read my post on Psalm 127 here).

Claudio Monteverdi by Bernardo Strozzi