A.D. 1081 - Two other ancient fountains appear in a document: Vetrice, of which every trace has been lost, and Fontebranda.

A.D. 1198 - The construction of Fontebranda (the structure was rebuilt in 1246).

A.D. 1226 - Is the first time that one finds the term "bottino," when the city was graced with only a few modest branches of aqueducts furnishing water to some of the principal fountains.

A.D. 1246 - Siena was facing an economic take-off and for this reason felt the need to increase the amount of water supplied by the fountains. The city sustained notable expenses to finish building the Fontebranda and to supply it with water. Fontebranda served the district in which leather, hides, and above all, wool were manufactured.

A.D. 1250 - The bottino which was to supply Fontebranda still was not finished, but other urban fountains (Follonica, Valdimontone, Pescaia and Vetrice) were included in the project of modernizing the network of underground aqueducts.

A.D. 1267 - The city began to study the possibility of diverting the water from the Merse river to the Sienese fountains. Thus the city interrupted work on the Fontebranda in order to concentrate its efforts on this research.

A.D. 1268 -The City Council met to examine the project of bringing water from the Merse. The first to speak was Bartolomeo Saracini who thought that the work should be entrusted to Friar Agnolo, but Alfonso Pelacani was against the project. The last word was had by Provenzano Salvani who warmly supported starting the work and gained the approval of the Council. The project failed miserably.

A.D. 1274 - The city began the work of excavating the bottino which would supply the as yet unbuilt Fontenuova, located inside Porta Ovile. Here were found some veins of water and the city calculated that with these veins they would be able to endow this neighborhood with a fountain. It would be built in the very first years of the 1300s.

A.D. 1288/1293 - An attempt was made to divert the water of the Tressa by means of a canal from heights of San Dalmazio. It was a pathetic attempt given how little water flowed in the brook.

A.D. 1300 - A failed attempt to augment Fontebranda with the overflow from the Fonte Pescaia.

A.D. 1321 - They began the construction of the Fontenuova in Vallerozzi.

A.D. 1334 - During the first part of the 1300s fruitless projects and attempts went forward. In 1334 Jacopo di Vanni di Ugolino worked on a project that would have brought water into the city from springs to its north. Three years after beginning the work it still was not complete. The work was suspended until 1339.

A.D. 1337 - The Fonte al Pino was built, near the Via delle Cerchia.

A.D. 1339 - The year in which a city commission took control of the project (of 1334) and gave its approval to reopening the construction site.

A.D. 1343 - Construction of the (original) Fonte Gaia in the Campo.

A.D. 1346 - The route of the bottino had reached Fontebecci and was connected with the waters of the Staggia at the altitude of Quercegrossa.

A.D. 1352 - The beginning of the work on the Fonte in Pellicceria. Construction of a fountain in Camporegio had been requested, and in the same year was construction of the Fonte alle Due Porte di Stalloreggi planned in the immediate vicinity of the Spedale di S. Maria della Scala, which was then called Fonte al Mandorlo (Fountain of the Almonds), of which no traces remain. In the second half of the fourteenth century Siena was struck by a major economic collapse as a result of the crisis in production, which was already perceptible in the period preceding the plague of 1348; a further, decisive blow came right after the epidemic. Still less money was available to finance public works. Thus the only projects in this period were those of building a fountain in the contrada (ward) of San Vigilio in 1360, and in the same year, building the Fonte della Prigione (Prison Fountain).

A.D. 1352 - The Fonte Serena, in Casato, was built.

A.D. 1361 - The connection was still not complete because the government of the Nine was brought down after seventy years of rule. There was also the war with Perugia and the invasion of the mercenary troops that devastated half of Tuscany.

A.D. 1387 -The work was begun again and the branch to Uopini was complete as well as the repairs.

A.D. 1397 - The problems of Fontebranda remained unresolved while the woolworkers still had grave difficulties (due to the lack of water). So the woolworkers themselves took on the expense of 600 to 900 gold Florins that was needed to bring water from Mazzafonda to Fontebranda.

A.D. 1429 - The work had arrived at Fontebecci and here it stopped.

A.D. 1437 - For the entire fifteenth century the work of bringing water from various springs continued.

A.D. 1438 - The great settling tank under the field of Camollia was built.

A.D. 1461 - There was still talk of the degradation and ruination of branches of the bottini, so bad that the water was in danger of never arriving in the fountains because of all the detritus in the aqueducts.

A.D. 1466 - The search for sources of water continued; in this period the subterranean network reached its maximum extent, of almost 25 kilometers.