Nobility of Italy

The nobility of Italy (Italian: "Nobiltà italiana") comprised individuals and their families of the Italian Peninsula, and the islands linked with it, recognized by the sovereigns of the Italian city-states since the Middle Ages, and by the kings of Italy after the unification of the region into a single state, the Kingdom of Italy.
Nobles had a specific legal status, and held most of the wealth and various privileges denied to other classes, mainly politicians. In most of the former Italian pre-Unification states it was the only class that had access to high-level government positions. They also practically monopolized the most distinguished positions in the city-states and in the Catholic Church for a long time. There were several different systems of nobility over time and in different regions.
From the Middle Ages until March 1861, "Italy" was not a single country but was a number of separate kingdoms and other states, with many reigning dynasties. These were often related by marriage to each other and to other European royal families. The Italian nobility was expanded into Africa with the creation of the Italian Empire in conquered Ethiopia and East Africa.
Although official recognition of Italian nobility ceased with the creation of the Italian Republic in 1946, titles of nobility are still used as courtesy titles.
History.
Pre-unification.
Before Italian Unification there was a relatively large number of members of the nobility in Italy.
In the 16th, 17th and 18th centuries, Italy (after the Renaissance) was home to myriad noble families that had risen to prominence via judicial appointment, election to the various regional senates or appointment to Catholic Church office.
There were also families which had been part of Italian nobility for many decades or even centuries. Writing in the 19th century, Leopold von Ranke recorded:
Papal nobility.
During this period, throughout Italy various influential families came to positions of power through the election of a family member as Pope or were elevated into the ranks of nobility through ecclesiastical promotion. These families freely intermarried with aristocratic nobility. Like other noble families, those with both papal power and money were able to purchase comunes or other tracts of land and elevate family patriarchs and other relatives to noble titles. Hereditary patriarchs were appointed "Duke", "Marquis" and even "Prince" of various 16th and 17th century "principalities". According to Ranke:
Popes commonly elevated members of prominent families to the position of Cardinal; especially second and third sons who would not otherwise inherit hereditary titles. Popes also elevated their own family members – especially nephews – to the special position of Cardinal-Nephew. Prominent families could purchase curial offices for their sons and regularly did, hoping that the son would rise through Church ranks to become a Bishop or a Cardinal, from which position they could dispense further titles and positions of authority to other family members.
The period was famous for papal nepotism and many families, such as the Barberini and Pamphili, benefited greatly from having a papal relative. Families that had previously been limited to agricultural or mercantile ventures found themselves, sometimes within only one or two generations, elevated to the Roman nobility when a relative was elected to the papal throne. Modern Italy is dotted with the fruits of their success – various family "palazzi" stand today as a testament to their sometimes meteoric rise to power.
Genoese nobility.
In the case of the Republic of Genoa, through the Constitutional Reform and the laws of 1528, 1548 and 1575, an aristocratic republic was inaugurated, which would last until 1797. With the constitutional reform of 1528, belonging to a albergo became from optional to compulsory, effectively transforming the alberghi into lists of registration to the city nobility recognized by the government. The reform required that the wealthiest citizens who owned six or more houses should originate a distinct albergo. On that occasion, it was decided to establish a single Order of noble citizens, otherwise known as Old Nobles, divided into twenty-three old and already existing alberghi and five new ones were created for the occasion. These associations were to prevent the resurgence of ancient hostilities and protect the wealth and power of the wealthiest families.
Florentine nobility.
The Florentine, and later Tuscan nobility distinguished itself in the two classes of Patricians, recognized as noble since before 1532, belonging to the Order of Saint Stephen, and residing only in the ancient noble homelands: Florence, Siena, Pisa, Pistoia, Arezzo, Volterra, Montepulciano and Cortona. And of the nobles, simple nobility, civic nobility, senators and commanders, with residence of the "new" noble homelands: Sansepolcro, San Miniato, Livorno, Pescia and Prato. Overall, the Florentine nobility was divided into feudal, senatorial and priority.
Milanese nobility.
In Milan, the first officially drawn up list of nobility was the "Matricula nobilium familiarum Mediolani" by Ottone Visconti, dated 20 April 1377, in which, however, only the noble Milanese families who helped the Visconti family in their seizure of power over the municipality of Milan were listed, therefore considered the most faithful and ancient nobility in the future lifetime of the city. From 5 September 1395 the Dukes of Milan officially obtained the right to grant nobility to as many nobles as there were, consistent with the recognition of the Duchy of Milan. During the whole ducal period, first of the Visconti and then of the Sforza, the nobility residing in the city was increasingly predisposed to become court nobility, in the direct service of the duke, especially in the field of arms and alliances for war purposes. These families, during this period, played a fundamental role in the politics of the territory, without ever completely outclassing the figure of the duke. Most of the Milanese patriciate is linked to this period, which in the following centuries will constitute a sign of distinction between the nobility granted "to the Milanese by their duke" and that granted by "foreigners".
Kingdom of Italy (1861–1946).
In the years preceding the political and social movement that resulted in the consolidation of different states of the Italian Peninsula into a single state, the Kingdom of Italy, the existence of the Kingdom of Sardinia, the Kingdom of the Two Sicilies (before 1816: the Kingdom of Naples and the Kingdom of Sicily), the Grand Duchy of Tuscany, the Duchy of Parma, the Duchy of Modena, the Duchy of Savoy, the Papal States and the Austrian Kingdom of Lombardy–Venetia led to parallel nobilities with different traditions and rules.
Unification.
Modern Italy became a nation-state during the Risorgimento on 17 March 1861, when most of the states of the peninsula and Kingdom of the Two Sicilies were united under King Victor Emmanuel II of the Savoy dynasty, hitherto monarch of the Kingdom of Sardinia, which included Piedmont. The architect of Italian unification was Count Camillo Benso di Cavour, the Chief Minister of Victor Emmanuel. Rome itself remained for a further decade under the Papacy, and became part of the Kingdom of Italy only in 1870. In September of that year, invading Italian troops entered the Papal state, and the ensuing occupation forced Pope Pius IX to his palace where he declared himself a prisoner in the Vatican, as did his successors, until the Lateran Pacts of 1929.
Nobility in the Kingdom.
Under the united Kingdom of Italy a new national nobility, an attempt (not wholly successful) to impose a uniform nobiliary law, was created, including male succession (although it was possible for ancient titles to be transferred to an heir in the female line by royal authority), and some acknowledgement was made by the King of Italy of titles conferred by Francis II of the Two Sicilies in exile by making new grants in the same name. Those nobles who maintained allegiance to the pope became known as the Black Nobility.
After the unification of Italy, its kings continued to create titles of nobility for eminent Italians, this time valid for all Italian territory. For example, General Enrico Cialdini was created "Duca di Gaeta" for his role during unification. The practice continued until the 20th century, when nominations would be made by the Prime Minister of Italy and approved by the Crown. In the aftermath of the First World War, most Italians who were ennobled received their titles through the patronage of the Mussolini government. Examples include General Armando Diaz ("Duca della Vittoria"), Admiral Paolo Thaon di Revel ("Duca del Mare"), Commodore Luigi Rizzo ("Conte di Grado e di Premuda"), Costanzo Ciano ("Conte di Cortellazzo i Buccari"), Dino Grandi ("Conte di Mordano") and Cesare Maria de Vecchi ("Conte di Val Cismon"). Many of these were victory titles for services rendered to the nation in the Great War. The writer and aviator Gabriele d'Annunzio was created "Principe di Montenevoso" in 1924, and the physicist, inventor, and Nobel laureate Guglielmo Marconi was also ennobled in 1924 as "Marchese Marconi". In 1937, Ettore Tolomei was ennobled as "Conte della Vetta". When Cardinal Eugenio Pacelli became Pope in 1939, Mussolini had the title of "Principe" posthumously bestowed on the new Pontiff's brother Francesco Pacelli, who had already been made a "Marchese" by the Holy See during his lifetime.
In 1929, the Lateran Treaty acknowledged all Papal titles created before that date and undertook to give unquestioned recognition to titles conferred by the Holy See on Italian citizens in the future.
After the successful Italian invasion of Abyssinia, the Mussolini government recommended some Italians to the king of Italy for titles of nobility. For example, Marshal Pietro Badoglio was created "Marchese del Sabotino" and later "Duke of Addis Abeba", while General Rodolfo Graziani became "Marchese di Neghelli".
Italian Republic.
In 1946, the Kingdom of Italy was replaced by a republic. Under the Italian Constitution adopted in 1948, titles of nobility, although still used as a courtesy, are not legally recognised.
Certain "predicati" (territorial designations) recognised before 1922 may continue to be attached to surnames and used in legal documents. Often these were historic feudal territories of noble families. Although a high court ruling in 1967 definitively established that the heraldic-nobiliary legislation of the Kingdom of Italy (1861–1946) is not current law, the title of the head of the noble family is still accorded to all descendants as courtesy titles.
Titles of nobility.
The southern kingdoms of Naples, Sicily, and Sardinia, as well as the Papal states, granted titles as in monarchies such as Spain, France, or England: duke, marquis, count, baron. The title of viscount was not, however, as frequent in Italy as elsewhere. Joseph Bonaparte conferred the title "prince" to be hereditary on his children and grandchildren.
In Northern Italy and Tuscany the situation was complicated by the many kinds of authorities granting titles.
Often, Italian comunes (also in the Kingdom of Naples) and republics granted or recognised the title of patrician, which was only regarded as a rank of nobility in Italy. The patriciate was an urban aristocracy, as opposed to a feudal one.
The Republic of Venice also granted feudal titles.
In the Middle Ages: 
During the Renaissance, noble families conquered most of the Italian city-states except the republics of Venice, Genoa, Lucca, San Marino and Ragusa.
Until 1806, parts of the present-day Italy, formed the Kingdom of Italy, belonging to the Holy Roman Empire. The emperor retained for himself the right of creating dukes and princes. The Northern Italian monarchs had received from the emperor the right of granting the lesser feudal titles (from marquess downwards), since these monarchs often were princes and dukes themselves.
When in 1861 the king of Sardinia annexed the other Italian states, the Consulta Araldica (the Italian college of arms) integrated these different and varied systems into the hierarchy described below. In practice, this took decades.
Ranks.
The official ranks under the Kingdom of Italy (1861–1946) were:
This hierarchy resulted from the overlapping of titles granted by the pre-unification states, though these were different from each other. As a consequence, titles were not evenly distributed throughout the country and in each region some titles may have been completely absent.
Post-WWII.
By 1946, with abolition of the monarchy, a number of titles borne by families in the pre-unification states (Two Sicilies, Papal State, etc.) still had not been matriculated by the Consulta Araldica. This explains the use of certain titles by families (and "claimants") whose position was not regularised between 1861 and 1946.