The city of Florence was originally divided into Quarters or Gates, which were, San Pancrazio on the west, San Pietro on the east, the Duomo on the north, and Santa Maria on the south. Afterwards, when the new walls were built and the city enlarged, these Quarters were changed to Sesti , or Sixths, by dividing Santa Maria into the Borgo and San Pietro Scheraggio, and adding the Oltrarno (beyond the Arno) on the southern bank. ↩