Why were florence and Venice central in the development of the Renaissance?

Answer 1

Mostly because the Medici family, who was very rich and powerful at the time, sponsored many artists like da Vinci, Brunelleschi, and Michalangelo, and without them they wouldn't have been able to create and sell so much work.

Answer 2

Florence is the central development of the Renaissance because it began and was a cultural movement that spanned roughly the 14th to the 17th century there. In Assassin's Creed 2, the probablity of the coordinators to create it as the center of attention was because it all simply began there.