Construction Prince Casimir was the second oldest son of the King of Poland and Grand Duke of Lithuania
Casimir IV and Queen
Elisabeth of Austria. After his elder brother
Vladislaus was elected as
King of Bohemia in 1471, Casimir became the heir apparent. However, he focused on devotion to God and became known for his piety. He became ill (most likely with
tuberculosis) and died at the age of 25. Prince Casimir was buried in a crypt under a Chapel of Chapel of the Blessed Virgin Mary that his father reserved for the royal family. He was the first burial in this chapel. It is located to the left of the entrance and is now known as the Wołłowicz Chapel after Bishop
Eustachy Wołłowicz. Other family members buried in the chapel were Casimir's brother
Alexander Jagiellon and two wives of Casimir's nephew
Sigismund II Augustus –
Elizabeth of Austria and
Barbara Radziwiłł.
Sigismund III Vasa, as a descendant of the Jagiellonians, had already begun efforts in 1600 to renovate the chapel; these intensified during the preparations for the prince’s canonization, which took place in 1604. In 1610, a fire broke out in Vilnius, in which the cathedral was damaged; it was subsequently restored in 1612–1619. The old small chapel did not suit the new function to house relics of a saint but no space could be found for a new chapel until Bishop Wołłowicz agreed to swap his chapel with the royal chapel in February 1624. The old Wołłowicz's chapel was demolished and construction started for the new Chapel of Saint Casimir. King Sigismund III Vasa financed the construction and hired Italian architect
Costante Tencalla for the chapel's plan. The construction was finished in 1631.
Decoration The interior finishing works continued for several more years, until 1636. The king had commissioned, before 1619, a reliquary coffin and a silver-and-ebony altar for the chapel, for which the figures were cast in 1627 by Augsburg goldsmiths, the brothers Hans Jacob Bair. The plague then prevailing in Vilnius, and ultimately his death in 1632, did not allow King
Sigismund III to see the chapel completed. It was only his son,
Władysław IV, who in the first year of peace during his reign, in 1636, was able to take part in the translation of the relics of Saint Casimir to the new place of worship. King Władysław IV continued work on the chapel, contributing to the creation of a separate sacristy, the decoration of the dome, and various painting and ornamental works. Among those involved in the chapel’s painted decoration were Giacinto Campana and Bartłomiej Strobel. In the years 1646–1648, the architect Benedykt Molli carried out certain modifications to the chapel. The painted and sculptural decoration of the chapel formed part of the dynastic propaganda of the House of Vasa in Poland–Lithuania. The walls were adorned with depictions of the military victories of the Jagiellons and the Vasas, as well as scenes from the lives of St. Casimir and
St. Sigismund. Particular care was devoted to this by King Władysław IV Vasa, who gave his son the names Sigismund Casimir Vasa, seeing him as his natural successor. For this reason, following the example of the
Habsburgs and the
Wittelsbachs, he ordered his heart to be buried in St. Casimir’s Chapel.
Destruction and reconstruction During the
Deluge, in 1655 Vilnius was occupied by Russian forces, which remained there until 1661. The city suffered extensive destruction; the cathedral and the castle, along with the chapel, became targets of deliberate devastation as symbols, among other things, of victories over Russia. The reconstruction of the chapel began in 1680, but its principal decoration was carried out after 1692 by
Pietro Perti and
Michelangelo Palloni. The rebuilding was financed by Lithuanian magnates: the Bishop of Smolensk and provost of the chapel, Eustachy Kotowicz, the Bishop of Samogitia,
Kazimierz Pac, and the Hetman
Kazimierz Jan Sapieha. The involvement of the royal court remains uncertain. Most of the dynastic and military decorations were not restored; instead, the focus shifted to scenes depicting the life and achievements of the saint. ==
Three-Handed St. Casimir==