Pope Martin V in the context of "Julian Cesarini"

The Council of Florence is the seventeenth ecumenical council recognized by the Catholic Church, held between 1431 and 1445. It was convened in territories under the Holy Roman Empire. Italy became a venue of a Catholic ecumenical council after a gap of about 2 centuries (the last ecumenical council to be held in Italy was the 4th Council of the Lateran in Rome's Lateran Palace). It was convoked in Basel as the Council of Basel by Pope Martin V shortly before his death in February 1431 and took place in the context of the Hussite Wars in Bohemia and the rise of the Ottoman Empire. At stake was the greater conflict between the conciliar movement and the principle of papal supremacy.

The Council entered a second phase after Emperor Sigismund's death in 1437. Pope Eugene IV translated the Council to Ferrara on 8 January 1438, where it became the Council of Ferrara and succeeded in drawing some of the Byzantine ambassadors who were in attendance at Basel to Italy. Some Council members rejected the papal decree and remained at Basel: this rump Council suspended Eugene, declared him a heretic, and then in November 1439 elected an antipope, Felix V.

The Renaissance in Rome occupied a period from the mid-15th to the mid-16th centuries, a period which spawned such masters as Michelangelo and Raphael, who left an indelible mark on Western figurative art. The city had been a magnet for artists wishing to study its classical ruins since the early 15th century. A revived interest in the Classics brought about the first archaeological study of Roman remains by the architect Filippo Brunelleschi and the sculptor Donatello, both Florentines. This inspired a corresponding classicism in painting and sculpture, which manifested itself in the paintings of Masaccio and Uccello. Pisanello and his assistants also frequently took inspiration from ancient remains, but their approach was essentially cataloguing, acquiring a repertoire of models to be exploited later.

In the year 1420, Pope Martin V moved the papal seat back to Rome, ending its long Avignon Papacy or "Babylonian captivity", and the Papal Schism, when several "popes" simultaneously claimed the office. He at once set to work, establishing order and restoring the dilapidated churches, palaces, bridges, and other public structures. For this reconstruction he engaged some famous masters of the Tuscan school, and thus laid the foundation for the Roman Renaissance.

The Archdiocese of Florence (Latin: Archidioecesis Florentina) is a Latin Church metropolitan see of the Catholic Church in Italy. It was traditionally founded in the 1st century, according to the 14th century chronicler Giovanni Villani. The diocese was directly subordinate to the Holy See (Papacy) until 1420.

Florence was elevated to the dignity of an archdiocese on 10 May 1419, by Pope Martin V. The ecclesiastical province of Florence, of which the Archbishop of Florence in the metropolitan, includes the suffragan dioceses of Arezzo-Cortona-Sansepolcro, Fiesole, Pistoia, Prato, and San Miniato.

The Renaissance Papacy was a period of papal history between the Western Schism and the Reformation. From the election of Pope Martin V of the Council of Constance in 1417 to the Reformation in the 16th century, Western Christianity was largely free from schism as well as significant disputed papal claimants. There were many important divisions over the direction of the religion, but these were resolved through the then-settled procedures of the papal conclave.

The popes of this period were a reflection of the College of Cardinals that elected them. The College was dominated by cardinal-nephews (relatives of the popes that elevated them), crown-cardinals (representatives of the Catholic monarchies of Europe), and members of the powerful Italian families. There were two popes each from the House of Borgia, House of della Rovere, and House of Medici during this period. The wealthy popes and cardinals increasingly patronized Renaissance art and architecture, (re)building the landmarks of Rome from the ground up.

The Council of Constance (Latin: Concilium Constantiense; German: Konzil von Konstanz) was an ecumenical council of the Catholic Church that was held from 1414 to 1418 in the Bishopric of Constance (Konstanz) in present-day Germany. This was the first ecumenical council convened in the Holy Roman Empire. The council ended the Western Schism by deposing or accepting the resignation of the remaining papal claimants and by electing Pope Martin V. It was the last papal election to take place outside of Italy.

The council also condemned Jan Hus as a heretic and facilitated his execution; and it ruled on issues of national sovereignty and the rights of pagans and just war in response to a conflict between the Grand Duchy of Lithuania, the Kingdom of Poland and the Order of the Teutonic Knights.

Pope Eugene IV (Latin: Eugenius IV; Italian: Eugenio IV; 1383 – 23 February 1447), born Gabriele Condulmer, was head of the Catholic Church and ruler of the Papal States from 11 March 1431 to his death in February 1447. Condulmer was a Venetian, and a nephew of Pope Gregory XII. In 1431, he was elected pope.

His tenure was marked by conflict: first with the Colonna, relatives of his predecessor Pope Martin V; and later with the Conciliar movement. In 1434, after a complaint by bishop of the Canary Islands Fernando Calvetos, Eugene IV issued the bull "Creator Omnium", rescinding any recognition of Portugal's right to conquer the islands, and rescinding any right to Christianize their native populations. Eugene also resisted slavery: he excommunicated anyone who had enslaved newly-converted Christians, such penalty to remain in place until the enslaved were restored to their liberty and possessions. Eugene initially sought to protect the Jews, and was quite active against a rampant societal anti-semitism—he issued decrees protecting their rights, opposing forced baptisms, and permitting wider economic activity. In 1442, however, he promulgated the bull Dudum ad nostram audientiam, which was later used as the legal basis for the creation of Jewish ghettos in Europe. In 1443, Eugene decided to take a neutral position on territorial disputes between Castile and Portugal and regarding rights claimed along the coast of Africa.

Guillaume Du Fay (/djuːˈfaɪ/ dyoo-FEYE, French: [ɡijom dy fa(j)i]; also Dufay, Du Fayt; 5 August 1397 – 27 November 1474) was a composer and music theorist of early Renaissance music, who is variously described as French or Franco-Flemish. Considered the leading European composer of his time, his music was widely performed and reproduced. Du Fay was well-associated with composers of the Burgundian School, particularly his colleague Gilles Binchois, but was never a regular member of the Burgundian chapel himself.

While he is among the best-documented composers of his time, Du Fay's birth and family is shrouded with uncertainty, though he was probably the illegitimate child of a priest. He was educated at Cambrai Cathedral, where his teachers included Nicolas Grenon and Richard Loqueville, among others. For the next decade, Du Fay worked throughout Europe: as a subdeacon in Cambrai, under Carlo I Malatesta in Rimini, for the House of Malatesta in Pesaro, and under Louis Aleman in Bologna, where he was ordained priest. As his fame began to spread, he settled in Rome in 1428 as musician of the prestigious papal choir, first under Pope Martin V and then Pope Eugene IV, where he wrote the motets Balsamus et munda cera, Ecclesie militantis and Supremum est mortalibus. Amid Rome's financial and political disorder in the 1430s, Du Fay took a leave of absence from the choir to serve Amadeus VIII, Duke of Savoy.

Niccolò Albergati (1373 – 9 May 1443) was an Italian Carthusian and a prelate of the Roman Catholic Church. He was appointed cardinal and served as a papal diplomat to France and England (1422–23) in addition to serving as the bishop of Bologna from 1417 until his death.

He accepted the position as bishop in obedience despite his extreme reluctance to accept the position but carried out his duties with care and attention to educational concerns. But two conflicts in his see caused him to depart and later return and he became known for being close to Pope Martin V and his successor Pope Eugene IV. Both men held Albergati in high esteem and nominated him to crucial positions within the Roman Curia and the diplomatic service to oversee important missions. He had prominent roles in the Council of Basel-Ferrara-Florence and also attended the Council of Florence.