In the 17th century, artistic patronage, including foundations, collecting works of art, cooperation with artists and amateur creation, was widely practiced in Poland, mainly at the royal court, among nobles and clergy, and among townspeople. At that time, patronage associated with the Catholic Church after the Council of Trent played a special role, contributing to the creation of new forms of expressing religious content in art. These initiatives included building new churches and decorating existing ones with works with more emotional and spiritual content. This patronage opened the field to various founders, both ecclesiastical and secular. There were many examples of patronage in the 17th century, both from clergy and lay people. These people often supported art through foundations and collecting works. Examples are the Order of Regular Lateran Canons at the Corpus Christi Church in Kazimierz in Kraków and the monastery of the Fathers. Bernardynów in Stradom. The various relationships between founders and artists reached far beyond Krakow. One of the outstanding patrons was Maciej Kazimierz Treter, a townsman and councilor of Kazimierz, who supported art in Kazimierz in the second half of the 17th century. His activity was an example of synergy between the Church and the founder, where artistic works created by the clergy reached a lay audience. To sum up, artistic patronage in the 17th century in Poland was ubiquitous, both among clergy and lay people, contributing to the development of sacred and secular art.