Republic of Siena in the context of "Grand Duchy of Tuscany"

The Duchy of Florence (Italian: Ducato di Firenze) was an Italian principality that was centred on the city of Florence, in Tuscany, Italy. The duchy was founded after Pope Clement VII, himself a Medici, appointed his relative Alessandro de' Medici as Duke of the Florentine Republic, thereby transforming the Republic of Florence into a hereditary monarchy.

The second Duke, Cosimo I, established a strong Florentine navy and expanded his territory, purchasing Elba and conquering Siena. In 1569, Pope Pius V declared Cosimo Grand Duke of Tuscany. The Medici ruled the Grand Duchy of Tuscany until 1737.

The State of the Presidi (Italian: Stato dei Presidi, meaning "state of the garrisons") was a small territory on the Tuscan coast of Italy that existed between 1557 and 1801. It consisted of remnants of the former Republic of Siena—the five towns of Porto Ercole and Porto Santo Stefano on the promontory of Monte Argentario, as well as Orbetello, Talamone and Ansedonia—and their hinterland, along with the islet of Giannutri and the fortress of Porto Longone on the island of Elba.

The Presidi encompassed about 300 square kilometres (120 sq mi). They were effectively attached to the Kingdom of Naples and changed hands several times with it, resulting in three distinct historical periods. From 1557 to 1707, they were a possession of the Crown of Spain administered by the Spanish Habsburg viceroy of Naples; from 1708 to 1733, a possession of the Austrian Habsburgs administered by their viceroy in Naples; and from 1733 to 1801, a dependency of the Spanish Bourbon kings of Naples. By the Treaty of Florence of 28 March 1801, the king of Naples ceded the Presidi to the French Republic, which then ceded them to the new Kingdom of Etruria. After the downfall of France in 1814 and the Congress of Vienna in 1815, the territories were granted to the restored Grand Duchy of Tuscany.

The denier (/dəˈnɪər/; Latin: denarius, Italian: denaro, Greek: δηνάριο, romanized: dinario; abbr. d.) or penny was a medieval coin which takes its name from the Frankish coin first issued in the late seventh century; in English it is sometimes referred to as a silver penny. Its appearance represents the end of gold coinage, which, at the start of Frankish rule, had either been Roman (Byzantine) or "pseudo-imperial" (minted by the Franks in imitation of Byzantine coinage). Silver would be the basis for Frankish coinage from then on. The denier was minted in France, Cyprus and parts of the Italian peninsula for the whole of the Middle Ages, in states such as the patriarchate of Aquileia, the Kingdom of Sicily, the Republic of Genoa, the Republic of Siena, Kingdom of Cyprus, and the crusader state Kingdom of Jerusalem, among others.

The Battle of San Romano was fought on 1 June 1432, in San Romano, some 30 miles outside Florence, between the troops of Florence, commanded by Niccolò da Tolentino, and Siena, under Francesco Piccinino. The outcome is generally considered favourable to the Florentines, but in the Sienese chronicles it was considered a victory. As the 1430s began Florence had found itself in conflict with the rival city state of Lucca, and her allies, Siena and Milan.

The Florentine deployed about 4,000 horse and 2,000 infantry. The clash, which lasted for some six or seven hours, consisted of a series of heavy cavalry fights. It was decided by the intervention of a second cavalry corps commanded by Micheletto Attendolo.