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Andrea del Verrocchio ( və-ROH-kee-oh, US also -⁠RAW-, Italian: [anˈdrɛːa del verˈrɔkkjo]; born Andrea di Michele di Francesco de' Cioni; c. 1435 – 1488) was an Italian sculptor, painter and goldsmith who was a master of a workshop in Florence. He was the teacher of Leonardo da Vinci, who assisted in painting The Baptism of Christ.
He became known as Verrocchio after the surname of his master, a goldsmith. Few paintings are attributed to him with certainty, but his pupils also included Pietro Perugino and Lorenzo di Credi. As a sculptor, his best known work is the Equestrian statue of Bartolomeo Colleoni in Venice.

General info from Wikipedia.org