Prince Jerzy Radziwiłł was a Polish–Lithuaniannobleman and Imperial Reichsfürst from the Radziwiłł family. He was ordained a Catholic priest and later rose through the ranks as Bishop of Vilnius eventually becoming a cardinal. He was a close friend and adviser of king Sigismund III of Poland and represented his interests in front of the Pope. Raised a Calvinist, Radziwiłł was educated at the University of Leipzig. In 1572 he converted to Catholicism and became associated with the Jesuits. He continued to study at Jesuit colleges in Poznań, Vilnius, and Rome. Radziwiłł began his duties as Bishop of Vilnius in 1579. He established Vilnius Seminary and helped to obtain university status for the Jesuit Academy in Vilnius. He was ordained to priesthood, and was not consecrated a bishop until December 26, 1583. He was elevated to the cardinalate by Gregory XIII only on December 12, 1583, and was assigned the titulus of S. Sisto July 14, 1586. He did not participate in the Conclave of 1585, which elected Sixtus V; or the Conclave of September, 1590, which elected Urban VII; or the Conclave of October 8-December 5, 1590, which elected Gregory XIV. In 1591, he became Bishop of Kraków. He did participate in the Conclave of October, 1591, which elected Innocent IX; and in the Conclave of January, 1592, which elected Clement VIII. Radziwiłł was also involved in political life. He served as deputy administrator of Polish Livonia from 1582 until 1585. He participated in the election of king Sigismund III Vasa and became his trusted adviser. Radziwiłł supported the Third Statute of Lithuania and the Union of Brest. He came to Rome to participate in the Jubilee of 1600, but died in Rome on January 21, and was buried in the Church of the Gesu.
Works
"Diary of a trip to Italy in 1575." Wierzbowski diary published in Latin in 1899.
The Notebook... from 1556–1575, ed. T. Wierzbowski, Warsaw 1899, Library of Forgotten Polish poets and prose writers of the sixteenth and eighteenth centuries, Volume 12
Official trip to Italy... in 1575, ed. H. Barycz Historical Quarterly 1935-copy manuscript: Czartoryski Library No. 2242, pp. 369–379.
Letters to the pope, the Nuncio And the Secretariat of State in the years 1575–1591, manuscripts Archives Vatican, E. Kuntze Poloniae Monumenta Vaticana, Vol 6
The S. Sokolowski, dates. 2 August 1583 in Riga, ed. F. Bracha "Science S. Sokolowski has the characteristics of the true church," Our past 1947, vol 2, p 133.
Letters from the years 1587–1597 to the Duke of Mantua, manuscripts Archivio di Stato in Mantua, Vol 3.
Single list of the years 1578, 1581 to 1583 from: Stefan Batory, A. Bolognettiego, Gregory XIII, ed. L. Boratyński Poloniae Monumenta Vaticana, Volume 4, E. Kuntze and C. Nanke, Monumenta Vaticana Poloniae, Vol 5, E. Kuntze Poloniae Monumenta Vaticana, Vol 6.
More than a dozen letters from the years 1578–1585 by J. Zamoyski, Ref.No. W. Nehring "Letters to the Radziwill Jan Zamoyski of the 1574–1602" Historical Quarterly 1890.
From P. Complaints dates. 13 January 1588 in Kraków, ed. WA Maciejowski Polish Literature, Vol 3 extra, Warszawa 1852, pp. 181–183.
From Sigismund III, dates. 18 July in Kraków, 14 December 1588 from genista, ed. JU Niemcewicz Collection of historical memoirs of former Polszcze, Volume 2, Warsaw 1822, pp. 466–469.
From Sigismund III, dates. 11 March 1592 in Kraków, ed. T. Wierzbowski Materials on the history of Polish literature, Volume 1, Warszawa 1900, pp. 301–302.
Letter from Garsias Alabianusa, dates. in Cracow, 4 June 1595 and the three documents concerning the visit of bishops from the years 1594 to 1599, Ref.No. F. Machay pastoral activity Radziwill Cardinal, Bishop of Cracow, Kraków 1936
For extra knowledge of letters and materials, see.: F. Machay pastoral activity Cardinal Radziwill, Bishop of Cracow, Kraków 1936 extra, O. Halecki "From florence to Brest," The Sacred Poloniae Millennium, t 5.