Complex sentence: This was also part of policy to suppress Serbian cultural imperialism; until 1918, many of territories, that later fell under iurisdiction of Serb Orthodox Church, belonged to eparchy of Dalmatia-Bukovina and were directly under the Patriarch of Constantinople.
Split into simpler sentences: This was also part of policy to suppress Serbian cultural imperialism. Until 1918, many of territories, that later fell under iurisdiction of Serb Orthodox Church, belonged to eparchy of Dalmatia-Bukovina and were directly under the Patriarch of Constantinople.