Leonardo da Vinci, Michaelangelo, Raffaello Sanzio da Urbino (Raphael) and Donato Bardi (Donatello) are some of the most prominent and influential artists of the Renaissance period. Three of the four (Leonardo, Raphael and Michaelangelo) were all alive at roughly the same time (although da Vinci was a teenager when Donatello died in 1466). My question is, is there any evidence that these artists ever met, or were familiar with the works of the others to any extent?
The fact that the Teenage Mutant Ninja Turtles were named after these artists, and I asked the question because of this fact is purely coincidental :-)