Porto Azzurro is a comune

Comune

In Italy, the comune is the basic administrative division, and may be properly approximated in casual speech by the English word township or municipality.-Importance and function:...

(municipality) in the Province of Livorno

Province of Livorno

The Province of Livorno or Leghorn is a province in the Tuscany region of Italy. It includes several islands of the Tuscan Archipelago, including Elba and Capraia. Its capital is the city of Livorno....

 in the Italian

Italy

Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

 region Tuscany

Tuscany

Tuscany is a region in Italy. It has an area of about 23,000 square kilometres and a population of about 3.75 million inhabitants. The regional capital is Florence ....

; it is on the island of Elba

Elba

Elba is a Mediterranean island in Tuscany, Italy, from the coastal town of Piombino. The largest island of the Tuscan Archipelago, Elba is also part of the National Park of the Tuscan Archipelago and the third largest island in Italy after Sicily and Sardinia...

, located about 130 km southwest of Florence

Florence

Florence is the capital city of the Italian region of Tuscany and of the province of Florence. It is the most populous city in Tuscany, with approximately 370,000 inhabitants, expanding to over 1.5 million in the metropolitan area....

 and about 90 km south of Livorno

Livorno

Livorno , traditionally Leghorn , is a port city on the Tyrrhenian Sea on the western edge of Tuscany, Italy. It is the capital of the Province of Livorno, having a population of approximately 160,000 residents in 2009.- History :...

. It formerly called Porto Longone, and in 1557 Jacob VI Appiani, Prince of Piombino, granted Spain the right to build a fortress there. It was transferred to the Kingdom of Naples

Kingdom of Naples

The Kingdom of Naples, comprising the southern part of the Italian peninsula, was the remainder of the old Kingdom of Sicily after secession of the island of Sicily as a result of the Sicilian Vespers rebellion of 1282. Known to contemporaries as the Kingdom of Sicily, it is dubbed Kingdom of...

 in 1735 under the terms of the 1725 Treaty of Vienna

Treaty of Vienna (1725)

The Treaty of Vienna was signed on April 30, 1725 between Emperor Charles VI of Austria and King Philip V of Spain.The treaty guaranteed the Pragmatic Sanction of the Habsburgs, which was first declared in 1713. Based on the terms of the treaty, the Austrian Empire relinquished all claims to the...

, and then to France in 1801, when Napoleon established the Kingdom of Etruria

Kingdom of Etruria

The Kingdom of Etruria was a kingdom comprising the larger part of Tuscany which existed between 1801 and 1807. It took its name from Etruria, the old Roman name for the land of the Etruscans.It was created by the Treaty of Aranjuez, signed on 21 March 1801...

.