Duchy of Amalfi in the context of "Maritime nation"

The maritime republics (Italian: repubbliche marinare), also called merchant republics (Italian: repubbliche mercantili), were Italian thalassocratic port cities which, starting from the Middle Ages, enjoyed political autonomy and economic prosperity brought about by their maritime activities. The term, coined during the 19th century, generally refers to four Italian cities, whose coats of arms have been shown since 1947 on the flags of the Italian Navy and the Italian Merchant Navy: Amalfi, Genoa, Pisa, and Venice. In addition to the four best known cities, Ancona, Gaeta, Noli, and, in Dalmatia, Ragusa, are also considered maritime republics; in certain historical periods, they had no secondary importance compared to some of the better known cities.

Uniformly scattered across the Italian peninsula, the maritime republics were important not only for the history of navigation and commerce: in addition to precious goods otherwise unobtainable in Europe, new artistic ideas and news concerning distant countries also spread. From the 10th century, they built fleets of ships both for their own protection and to support extensive trade networks across the Mediterranean, giving them an essential role in reestablishing contacts between Europe, Asia, and Africa, which had been interrupted during the early Middle Ages. They also had an essential role in the Crusades and produced renowned explorers and navigators such as Marco Polo and Christopher Columbus.

The Order of Knights of the Hospital of Saint John of Jerusalem, commonly known as the Knights Hospitaller (/ˈhɒspɪtələr/), is a Catholic military order. It was founded in the crusader Kingdom of Jerusalem in the 12th century and had its headquarters there, in Jerusalem and Acre, until 1291, thereafter being based in Kolossi Castle in Cyprus (1302–1310), the island of Rhodes (1310–1522), Malta (1530–1798), and Saint Petersburg (1799–1801).

The Hospitallers arose in the early 12th century at the height of the Cluniac movement, a reformist movement within the Benedictine monastic order that sought to strengthen religious devotion and charity for the poor. Earlier in the 11th century, merchants from Amalfi founded a hospital in Jerusalem dedicated to John the Baptist where Benedictine monks cared for sick, poor, or injured Christian pilgrims to the Holy Land. Blessed Gerard, a lay brother of the Benedictine order, became its head when it was established. After the Christian conquest of Jerusalem in 1099 during the First Crusade, the Hospitallers rose in prominence and were recognized as a distinct order by Pope Paschal II in 1113.

Amalfi (UK: /əˈmælfi/, US: /ɑːˈmɑːlfi/, Italian: [aˈmalfi]) is a town and comune in the province of Salerno, in the region of Campania, Italy, on the Gulf of Salerno. It lies at the mouth of a deep ravine, at the foot of Monte Cerreto (1,315 metres, 4,314 feet), surrounded by dramatic cliffs and coastal scenery. The town of Amalfi was the capital of the maritime republic known as the Duchy of Amalfi, an important trading power in the Mediterranean between 839 and around 1200. It has 4,611 inhabitants.

The town became a popular seaside resort beginning in the Edwardian era, with members of the British upper class spending their winters in Amalfi. Amalfi is included in the UNESCO World Heritage Sites.

Patricianship, the quality of belonging to a patriciate, began in the ancient world, where cities such as Ancient Rome had a social class of patrician families, whose members were initially the only people allowed to exercise many political functions. In the rise of European towns in the 12th and 13th centuries, the patriciate, a limited group of families with a special constitutional position, in Henri Pirenne's view, was the motive force. In 19th century Central Europe, the term had become synonymous with the upper Bourgeoisie and cannot be interchanged with the medieval patriciate in Central Europe. In the maritime republics of the Italian Peninsula as well as in German-speaking parts of Europe, the patricians were as a matter of fact the ruling body of the medieval town. Particularly in Italy, they became part of the nobility and it became a noble title.

With the establishment of the medieval towns, Italian city-states and maritime republics, the patriciate was a formally defined social class of governing wealthy families. They were found in the Italian city-states and maritime republics, particularly in Venice, Genoa, Pisa and Amalfi. They were also found in many of the free imperial cities of the Holy Roman Empire, such as Nuremberg, Ravensburg, Augsburg, Konstanz, Lindau, Bern, Basel, Zürich, St. Gallen and many more.

The Codex diplomaticus Caietanus (CDC) is an edited collection of documents (diplomas) pertaining to the Southern Italian city of Gaeta in the Middle Ages, from the eighth century to the fourteenth. The collection represents "for its geographically restricted range ... a relative abundance of sources". The Codex consists of documents kept in the archives of the Abbey of Montecassino, including the archives of the Gattola family, which were given to the abbey. The Codex was originally conceived in the late eighteenth century and finally published, as part of the Tabularium casinense series, by the monks of Montecassino in three volumes beginning with the first in 1887, the second volume in 1891 and the third volume in two installments in 1958 and 1960. Although the assembling of all the documents relating to medieval Gaeta was sometimes undertaken uncritically, the monks appended a comprehensive and trustworthy index.

The Codex is the main source for the history of the Duchy of Gaeta and it provides greater detail for it than for the neighbouring early medieval states of Amalfi, Naples and Sorrento.