The chapel originally had eight pure silver sculptures that measured about in height and that were melted during the Deluge (1655–1660), but they stood in the main altar. The marble niches were probably created in 1620s or 1630s but there is no mention that they had any sculptures in them until 1737 when an inventory listed eight wooden sculptures of kings and emperors. According to Marija Matušakaitė, the sculptures are of late Baroque style and should be dated the second quarter of the 18th century. The first claims that the sculptures depict Polish kings were recorded in a 1828 report of canonical visitation and in a 1835 book on the history of Vilnius by . This theory of the Jagiellonian kings gained popularity and in 1878 the names were written in gilded letters on the postaments: Władysław II Jagiełło (Jogaila) (reigned 1386–1434), Władysław of Varna (1434–1444), Casimir IV Jagiellon (1447–1492), Saint Casimir, John I Albert (1492–1501), Alexander Jagiellon (1501–1506), Sigismund I the Old (1507–1548), and Sigismund II Augustus (1548–1572). At some point, Lithuanian historiography replaced Władysław of Varna with Władysław IV Vasa (1632–1648). The writings since has disappeared, but these names are often cited.