Developement of Florence in the past time
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City walls in the 1st century B.C.
the inhabitants of the city were about 2000 - 2500

City walls in 539
the inhabitants of the city were about 1000

City walls in the 825
the inhabitants of the city were about 4000 - 5000

City walls in the 1078
the inhabitants of the city were about 15-20000

City walls in the 1172
the inhabitants of the city were about 35-40000

City walls in the 1284
the inhabitants of the city were about 85000