What armenians do in church?

the Armenian Apostholic church never splitted from the Catholic Church. there was a major separation of churches back in 451 AD (see: Council of Chalcidon), and the Armenian church is from one part...

At Via Giulia near Trastevere (the river Tiber).

abominable pratice

Greek Orthodox Christians belong to the Eastern Orthodox Church, which is led by a group of self-governing Patriarchs, such as the Patriarch of Antioch, Alexandria, or Jerusalem. These Patriarchs are...

In the christian belief, it isn't the building that is the church; A church is the body of believers, who meet within the building.