Matteotti Place (ex Calcandola) has an irregular plan, like a trapezium with the north-east angle extended towards the outside. This form is not due to a project but it is the final result of a long work of adaptation made by men to settle in this particular place: in fact, this area, between the stream Calcandola and the “burgus Sarzane” (XI cent.), was at the beginning a gravel alluvial sweep, subject to the frequent floodings of the Calcandola. To this area belonged also the modern Piazza Luni and the place where there is the Town hall palace of the XV- XVI century.

On this ground, at the ending of the XII c. the first living units started to settle. They should be numerous if in a document of the Pelavicino manuscript it is, already, spoken about “the new village of Calcandola”.

It belongs to this period the first definition of the square on its northen side, because the south area (via Bertoloni) should has a commercial destination as it was near the tower above the stream and near the main trade street, Via Mazzini, or as some researchers said Via Sobborgo Spina.
This finds confirmation also in the toponym “n’Caleri”, still in use, with which it is called this part of the town and that means a place used for the loading and unloading of the wood (E. Callegari).
In the following centuries it goes on the building activity together with the ones of reclamation and control of the waters, so that in the 14th century the square is an integral part of the new town of Sarzana and new commercial, craft activities and apothecaries are opened: in one of these will born Tommaso Parentucelli, the future Pope Niccolò V.

In the 15th century piazza Calcandola is the most important public place and it is chosen to build in it the new public palace: in this period there is also the building of new arcades whose, recently, come to light the original columns.
In the 16th century the square is completed in its principal features as it can be seen nowadays: in fact the town hall palace and Parentucelli palace are finished, the existing buildings are expanded and new buildings are made.

It can be said that, at the end of this century, the square has the aspect of new aristocracy, it is the natural development and conclusion of the ancient main road of the village: in the XVII and XVIII century, new and elegant palaces will be built as an embellishment competition that will finish at the beginning of the 19th century with Podestà palace.