Province of Bologna
The Province of Florence was bordered by the Province of Bologna in the north, the Province of Ravenna and Forlì-Cesena in the north-east, the provinces of Prato, Pistoia, Pisa and Lucca in the west; the Province of Siena in the south and the Province of Arezzo in the east and southeast. Much of the province lied in the plain of the Arno river.