Aqueduct of Colognole

The scheme was centred on the 18 km (11 mi) long aqueduct which runs south to north bringing water to the city from Colognole.

Work stopped in 1799 on the death of Salvetti and, because of the political difficulties and upheavals in Tuscany caused by the first disruptive phases of the Napoleonic occupation of Tuscany, did not resume until 1806, when Maria Louisa, regent of Etruria, acting for her infant son, appointed the architect Riccardo Calocchieri to supervise the work.

Later, in 1809, during the French occupation of Tuscany and reign of Elisa Bonaparte, Poccianti was appointed by the newly formed "Comune of Livorno" to oversee the project and under his direction work continued until 1824, the date usually considered as that of the aqueduct's completion.

However, modifications were always being implemented, and after Poccianti's death in 1858, the project was continued by his successor Angiolo della Valle.

The aqueduct crosses valleys in the Livorno Hills, supported on great arches which tower above the forests and slopes of macchie below.