In the 16th-17th centuries, the Jesuit order shaped certain ideas about the liturgical and theological aspects of the sacrament of confession, many of which were adopted by the Orthodox Churches through the writings of the Athonite monk Nicodemus the Hagiorite. The Norwegian liturgical and theological tradition of confession bears an indelible imprint both of scholastic theology and of Luther's theology. Thus, all three traditions of confession—Catholic, Orthodox, and Lutheran—possess common roots as well as significant differences. This paper aims to identify similarities and differences between these traditions in both theology and liturgy. On the one hand, it examines the definitions of the Council of Trent (1545-1563) on confession (1551, Session XIII), their reception by the Italian Jesuits Paolo Segneri and Giovanni Pietro Pinamonti, as well as the influence of Catholic doctrine and confession practices on the views of Nicodemus the Hagiorite (1749-1809). On the other hand, the study explores the relationship between Latin theology of confession and Martin Luther's teaching on confession as presented in the Small Catechism, and its connection to the doctrine of Erik Pontoppidan in his book Sandhed til Gudfrygtighed (1737). The contemporary doctrine of the Church of Norway on confession is considered as the result of the development of a centuries-long tradition. The similarities and differences between the modern practice of confession in Orthodoxy and in the Church of Norway are also presented. For clarity, the results are summarized in a table.