John Leonardi

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Saint John Leonardi
Born 1541
Diecimo, City-state of Lucca, (now Lucca, Tuscany, Italy)
Died October 9, 1609(1609-10-09) (aged 67–68)
Rome, Papal States
Venerated in Roman Catholic Church
Beatified 1861 by Pope Pius IX
Canonized 1938 by Pope Pius XI
Major shrine Santa Maria in Campitelli
Feast October 9
Patronage pharmacists[1]

Saint John Leonardi (Italian: Santo Giovanni Leonardi; 1541 – October 9, 1609) was founder of the Clerks Regular of the Mother of God of Lucca. He was born in the City-state of Lucca, Tuscany, in the year 1541. He was ordained as a priest in 1572. He first dedicated himself to the Christian formation of young people in his parish (Lucca).

In 1574, he founded a community charged to deepen faith and devotion; this foundation occurred as part of the movement known as the Counter-Reformation. John Leonardi worked with this community to spread devotion to the Blessed Virgin Mary, devotion to the Forty Hours, and frequent reception of the Holy Eucharist.

This foundation received approval from Pope Paul V in 1614. John Leonardi took his work to Rome where he became friends with Philip Neri. Neri held him in high regard for his qualities of firmness and judgment and entrusted him to delicate works, such as the reform of the Benedictine congregation of Montevergine.

John then founded with J. Vivès the seminary of the Propagation of the Faith. He died in 1609, dedicating himself to his brothers suffering from the influenza epidemic that was raging in Rome at the time.

The final Rule of his community was published in 1851. Two houses of the Clerks of the Mother of God were opened when he died, three others were opened during the seventeenth century. John was beatified in 1861 and canonized in 1938. St John Leonardi's feast day is celebrated on October 9.


  1. ^ (October 7, 2009). On St. John Leonardi. ZENIT.
  • "Encyclopédie des Saints et de la Sainteté," Hachette (French)

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