
The Kingdom of the Two Sicilies was a kingdom located in Southern Italy from 1816 to 1860. The kingdom was the largest sovereign state by population and size in Italy prior to Italian unification, comprising Sicily and all of Peninsula Italy south of the Papal States, covering most of the area of today's Mezzogiorno.

Brigandage in Southern Italy had existed in some form since ancient times. However its origins as outlaws targeting random travellers would evolve vastly later on in the form of the political resistance movement. During the time of the Napoleonic conquest of the Kingdom of Naples, the first signs of political resistance brigandage came to public light, as the Bourbon loyalists of the country refused to accept the new Bonapartist rulers and actively fought against them until the Bourbon monarchy had been reinstated. Some claim that the word brigandage is a euphemism for what was in fact a civil war.

The Insurrection of 1847 in the Two Sicilies is a series of three revolts that happened in September 1847 in the Kingdom of the Two Sicilies. Its aim was the unification of Italy and the establishment of either a constitutional monarchy or a republic. The insurrection is often considered as a continuation of the Neapolitan revolution of 1820 and at the same time as a foretaste of the Sicilian revolution of 1848 and of the spring of nations.

A justiciarate or justiciarship was a type of administrative subdivision that was used by several Italian states in the medieval period.

In Italy, there are some active movements and parties calling for autonomy or even independence for the areas comprised within the historical Kingdom of the two Sicilies: that is, Southern Italy and/or the region of Sicily. No political movement promoting these ideas has ever been successful in gaining traction among the population. The movement remains on the fringes with no representation in the Italian parliament.

The Terra di Otranto, or Terra d’Otranto, is an historical and geographical region of Apulia, largely corresponding to the Salento peninsula, anciently part of the Kingdom of Sicily and later of the Kingdom of Naples, which became a province of the Kingdom of the Two Sicilies.

The ducat was the main currency of the Kingdom of the Two Sicilies between 1816 and 1860. When the Congress of Vienna created the kingdom merging the Kingdom of Naples and the Kingdom of Sicily, the ducat became at par a continuation of the Neapolitan ducat and the Sicilian piastra issued prior to 1816, although the Sicilian piastra had been subdivided into 240 grana. In the mainland part of the kingdom, the ducat also replaced the Napoleonic lira.