Leonardo da Vinci spent a full decade — considerably longer than was customary — apprenticing at a Florentine bottega, or workshop, run by a man named Andrea del Verrocchio. A good artist but a better businessman, Verrocchio surely spotted the burgeoning genius in the young artist from an “illegitimate” family, but he nonetheless insisted Leonardo start on the bottom rung like everyone else, sweeping floors and cleaning chicken cages. (The eggs were used to make tempera paint before the advent of oil.) Gradually, Verrocchio gave his charge greater responsibility, even permitting him to paint portions of his own artwork. Why did Leonardo stay an apprentice for so long? He could easily have found work elsewhere, but he clearly valued the experience he acquired in the dusty, chaotic workshop. Too often, modern-day mentoring programs, public or private, are lip service. They must instead, as during Leonardo’s time, entail meaningful, long-term relationships between mentors and their mentees.

https://hbr.org/2016/01/renaissance-florence-was-a-better-mo...