Question

How did florence became one of the richest cities in europe?

Answer 1

Florence is remembered as the genesis of renaissance and wealth and wealth in cities uniqueness and architecture. During the middle ages, the city was wealthy of natural resources i.e. Marble quarries where building and sculptures were made. 
During this period great thinkers, philosophers, artists, architects and political figures like Leonardo da Vinci, Donantello, Ghiberti.