Researching Pope Leo

Born into the prominent political and banking Medici family of Florence, Giovanni was the second son of Lorenzo de' Medici, ruler of the Florentine Republic, and was elevated to the cardinalate in 1489. Following the death of Pope Julius II, Giovanni was elected pope after securing the backing of the younger members of the Sacred College. Early on in his rule he oversaw the closing sessions of the Fifth Council of the Lateran, but struggled to implement the reforms agreed. In 1517 he led a costly war that succeeded in securing his nephew as Duke of Urbino, but reduced papal finances.

In Protestant circles, Leo is associated with granting indulgences for those who donated to reconstruct St. Peter's Basilica, a practice that was soon challenged by Martin Luther's 95 Theses. Leo rejected the Protestant Reformation, and his Papal bull of 1520, Exsurge Domine, condemned Martin Luther's condemnatory stance, rendering ongoing communication difficult.

He borrowed and spent money without circumspection and was a significant patron of the arts. Under his reign, progress was made on the rebuilding of St. Peter's Basilica and artists such as Raphael decorated the Vatican rooms. Leo also reorganised the Roman University, and promoted the study of literature, poetry and antiquities. He died in 1521 and is buried in Santa Maria sopra Minerva, Rome. He was the last pope not to have been in priestly orders at the time of his election to the papacy.

Leo XII was in ill health from the time of his election to the papacy to his death less than 6 years later, although he was noted for enduring pain well. He was a deeply conservative ruler, who enforced many controversial laws, including one forbidding Jews to own property. Papal finances were also poor, even though he raised taxes. As a result, Leo XII's reign was unpopular and provoked widespread discontent within the Papal States.

He is well known for his intellectualism and his attempts to define the position of the Catholic Church with regard to modern thinking. In his famous 1891 encyclical Rerum novarum, Pope Leo outlined the rights of workers to a fair wage, safe working conditions, and the formation of trade unions, while affirming the rights of property and free enterprise, opposing both socialism and laissez-faire capitalism. He influenced Mariology of the Catholic Church and promoted both the rosary and the scapular.

Leo XIII issued a record of eleven papal encyclicals on the rosary, earning him the title as the "Rosary Pope". In addition, he approved two new Marian scapulars and was the first pope to fully embrace the concept of Mary as Mediatrix. He was the first pope to have never held any control over the Papal States, after they had been dissolved by 1870. He was briefly buried in the grottos of Saint Peter's Basilica before his remains were later transferred to the Basilica of Saint John Lateran.

Leo IX favored traditional morality in his reformation of the Catholic Church. One of his first public acts was to hold the Easter synod of 1049; he joined Emperor Henry III in Saxony and accompanied him to Cologne and Aachen. He also summoned a meeting of the higher clergy in Reims in which several important reforming decrees were passed. At Mainz he held a council at which the Italian and French as well as the German clergy were represented, and ambassadors of the Byzantine emperor were present. Here too, simony and the marriage of the clergy were the principal matters dealt with. He is regarded as a saint by the Catholic Church, his feast day celebrated on 19 April.