“Catholicism. Reader on the subject “Comparative Theology” is a collection of key texts on the subject “History of Western Confessions and Comparative Theology”, which is studied in the highest theological schools of the Russian Orthodox Church. It presents both official documents reflecting various aspects of the dogmatic teaching of the Roman Catholic Church, as well as polemical writings of Orthodox authors. Both previously translated texts into Russian and new ones written by the compiler are presented. The book is intended for theologians, Church historians, teachers and students of theological schools and theological faculties, as well as for everyone interested in theological issues.