In several of the autocephalous Eastern Orthodox churches and Eastern Catholic Churches, the patriarch or head bishop is elected by a group of bishops called the Holy Synod. For instance, the Holy Synod is a ruling body of the Georgian Orthodox Church.
In Oriental Orthodoxy the Holy Synod is the highest authority in the church and it formulates the rules and regulations regarding matters of church organization, faith, and order of service.
Wikipedia https://en.wikipedia.org/wiki/Holy_Synod
Address 2 улица Шипка, София 1000, Bulgaria
Coordinates 42°41'42.987" N 23°19'54.89" E