thumb|150px|Fresco of Saint Casimir in the , painted in the 19th century While the devotion to Casimir is most prevalent in Lithuania and Poland and their diaspora communities, his cult can be found in other countries as well. In the 17th century, at least two societies of Saint Casimir were active in Mechelen and Antwerp (now Belgium). In the 17th century, Casimir's cult also spread in Italy, particularly Florence, Palermo, Naples; his cult in Rome was more associated with Polish dignitaries and émigrés. Musical performances were organized in Rome in 1675 (words by Sebastiano Lazzarini, music by Francesco Beretta, performed at Santo Spirito in Sassia) and in 1678 (words by Ottavio Santacroce, music probably by Giovanni Bicilli, performed at Santa Maria in Vallicella on the occasion of the visit by Michał Kazimierz Radziwiłł and his wife Katarzyna Sobieska), and in Florence in 1706 (words possibly by Cardinal Pietro Ottoboni, music by Alessandro Scarlatti). In Palermo, Pietro Novelli was commissioned painting Coronation of Saint Casimir (l’Incoronazione di s. Casimiro) for the altar of (now held at the Galleria Regionale della Sicilia).
thumb|150px|Fresco of Saint Casimir in the , painted in the 19th century While the devotion to Casimir is most prevalent in Lithuania and Poland and their diaspora communities, his cult can be found in other countries as well. In the 17th century, at least two societies of Saint Casimir were active in Mechelen and Antwerp (now Belgium). In the 17th century, Casimir's cult also spread in Italy, particularly Florence, Palermo, Naples; his cult in Rome was more associated with Polish dignitaries and émigrés. Musical performances were organized in Rome in 1675 (words by Sebastiano Lazzarini, music by Francesco Beretta, performed at Santo Spirito in Sassia) and in 1678 (words by Ottavio Santacroce, music probably by Giovanni Bicilli, performed at Santa Maria in Vallicella on the occasion of the visit by Michał Kazimierz Radziwiłł and his wife Katarzyna Sobieska), and in Florence in 1706 (words possibly by Cardinal Pietro Ottoboni, music by Alessandro Scarlatti) In Palermo, Pietro Novelli was commissioned painting Coronation of Saint Casimir (l’Incoronazione di s. Casimiro) for the altar of (now held at the Galleria Regionale della Sicilia).