In 1323 AD, Karelians suffered a forceful sundering as Sweden and Novgorod divided Karelian lands and their inhabitants by signing a peace agreement. The agreement transferred governance of all western Karelian lands to Swedish sovereignty, while eastern Karelian lands fell under Novgorodian rule. This sundering started a long process of separation of Karelians into two different halves, with the main difference being religion, as western Karelians became first Roman Catholic and later Lutheran, while eastern Karelians were converted to Eastern Orthodoxy.