built by Emperor Augustus, the Alsietinus Aqueduct supplied Rome with water bringing it from Lake Alsietinus to Trastevere.

The Trajan’s Aqueduct was built and at the same period a part of the Alsetinus aqueduct was restored.

The Alsetinus aqueduct was no longer in use due to a decrease in the water Level of Lake Alsietinus.

The Trajan’s Aqueduct was cut off during the siege of Rome by Vitige king of the Ostrogoths.

The Trajan’s Aqueduct was restored by Belisario and Pope Honorius I, and further by Pope Adriano I.

The Trajan’s Aqueduct was damaged by Longobards in the 8th century and by the Saracens in the 9th century AD. However it remained quite always in use, with some variation in water flow, till the 9th – 10th century AD.

Some serious structural problems occurred in the Trajan’s aqueduct in the 15th century.

The works for Paulinus Aqueduct began by Pope Paul V aiming to bring water to the Janiculum Hill and the Vatican. To a large part this aqueduct concerns the restoration of the previous existing aqueducts, Trajan and Also Alsetinius (thanks to an unforeseen increase of the Alsietinus Lake level).

The water from the Paulinus Aqueduct reached the top of Janiculum Hill.

The water from the Paulinus Aqueduct reached the monumental fountain “Fontatone” that was launched the same year.

The water from the Paulinus Aqueduct reached the monumental fountain in Trastevere that was launched the same year.

The works of the Paulinus Aqueduct ended, with some modification of the original plan and the opening of the entire work.

The catching point of Paulinus aqueduct at Marmotta (Lake Bracciano) was reconstructed by Pope Pius VI.

The works of the cotemporary ACEA Aqueduct began involving, among others, the construction of a circum-lacustrine sewer around the Bracciano Lake basin.

The ACEA Aqueduct supplying Rome with Water was launched.