What are the main differences between Orthodoxy and Catholicism?

The differences between Orthodoxy and Catholicism are manifested both in dogma (doctrine) and in church tradition. As for the dogmas, the attitude towards the Holy Spirit differs here: Catholics believe that it comes from the Father and the Son, the Orthodox – only from the Father. In addition, Catholics have a dogma about the Immaculate Conception of the Virgin Mary, which is absent in Orthodoxy. In church regulations, the difference lies in the fact that Catholic priests cannot marry (obligatory celibacy), and the Orthodox clergy can choose whether to marry them or not.