A Gran maestro was the unofficial head of state in the Italian city-states

Italian city-states

The Italian city-states were a political phenomenon of small independent states mostly in the central and northern Italian peninsula between the 10th and 15th centuries....

. The role could depend on holding a particular office, military power or a general subversion of the constitution.

The Scaliger

Scaliger

The noble family of the Scaliger were Lords of Verona. When Ezzelino III was elected podestà of the commune in 1226, he was able to convert the office into a permanent lordship...

 family in Verona

Verona

Verona ; German Bern, Dietrichsbern or Welschbern) is a city in the Veneto, northern Italy, with approx. 265,000 inhabitants and one of the seven chef-lieus of the region. It is the second largest city municipality in the region and the third of North-Eastern Italy. The metropolitan area of Verona...

 converted their control of the office of podestà

Podestà

Podestà is the name given to certain high officials in many Italian cities, since the later Middle Ages, mainly as Chief magistrate of a city state , but also as a local administrator, the representative of the Emperor.The term derives from the Latin word potestas, meaning power...

into a permanent lordship as early as 1226. The Sforza dynasty

House of Sforza

Sforza was a ruling family of Renaissance Italy, based in Milan.-History:The dynasty was founded by Muzio Attendolo , called Sforza , a condottiero from Romagna serving the Angevin kings of Naples...

 rose from condottieri

Condottieri

thumb|Depiction of [[Farinata degli Uberti]] by [[Andrea del Castagno]], showing a 15th century condottiero's typical attire.Condottieri were the mercenary soldier leaders of the professional, military free companies contracted by the Italian city-states and the Papacy, from the late Middle Ages...

 to be dukes of Milan

Milan

Milan is the second-largest city in Italy and the capital city of the region of Lombardy and of the province of Milan. The city proper has a population of about 1.3 million, while its urban area, roughly coinciding with its administrative province and the bordering Province of Monza and Brianza ,...

 in 1447. The Medici

Medici

The House of Medici or Famiglia de' Medici was a political dynasty, banking family and later royal house that first began to gather prominence under Cosimo de' Medici in the Republic of Florence during the late 14th century. The family originated in the Mugello region of the Tuscan countryside,...

 relied on financial power and control of the selection process for office to establish their own dominance in 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....

, although it took them until 1531 to acquire the formal title of Grand Duke

Grand Duke

The title grand duke is used in Western Europe and particularly in Germanic countries for provincial sovereigns. Grand duke is of a protocolary rank below a king but higher than a sovereign duke. Grand duke is also the usual and established translation of grand prince in languages which do not...

 and abolish all vestiges of the republic

Republic of Florence

The Republic of Florence , or the Florentine Republic, was a city-state that was centered on the city of Florence, located in modern Tuscany, Italy. The republic was founded in 1115, when the Florentine people rebelled against the Margraviate of Tuscany upon Margravine Matilda's death. The...

.