In the Baptism of Christ (1470) of Verrocchio, you can see the earliest identified work of his most famous pupil, Leonardo da Vinci the background landscape and the angel on the left, beautiful enough to reduce his companion angel to wide-eyed jealousy.
Verrocchio worked on a painting called the Baptism of Christ in 1470.
Leonardo da Vinci was never a pupil of Verrocchio.