In what part of Italy did the renaissance begin? Why did it start there

The Renaissance (in Italian "Rinascimento") started in the region Tuscany during 1500s.

But it started precisely in the city of Florence.

Why?

1) recovery after an economic and social crisis.

2) bankruptcy.

3) plague.

4) famine.

5) civil wars.

6) Milan threats Florence.

7) Gian Galeazzo Visconti wants to create a national state governed by Milan.

8) Florence wanted more indipendence.

Also Florence was a city anti-aristocratics, with a secondary role of the Pope and the Church. Florence had a corporative system, and big families of bankers and merchants (like Medici).

Consier also that a lot of "Signori", especially in Florence used to pay painters, sculptors and writers.

Florence is also called "The city of art". Florence always had great artists ...