In 1965, the church board decided to purchase an estate in Soulemaniye quarter to build its permanent sanctuary and the parsonage on it.

From the time of its founding, the church played a great role in the formation of the Christian, moral and national character of hundreds of children, teenagers, youth and grown ups who attended its services.

One of the groups moved to a nearby neighborhood called Hayik and established a separate church there.

The name "Nahadagatz" was chosen to commemorate the Armenian Martyrs' who have suffered the atrocities of the Young Turks' regime between the years 1914–1918.

At the beginning, the congregation used to meet in an ancient courtyard close to the Salibe Christian quarter, then in 1936 the church moved to a rented building which was known at that time as the "Armenian Red Cross building" in Sulemaniye neighborhood.

In 1960, the church board bought a new lot in Sulemaniye and after securing the necessary funds built its permanent sanctuary, which was officially inaugurated on 14 March 1965.

Dr. Haroutune Nazarian (1907–2002) is always remembered as one of the most committed lay members of the church who implemented his passion, vision, and service for "Nahadagatz" throughout his life.

From the time of its foundation, the church has played a major role in the formation of the Christian, moral and ethnic character of hundreds of Armenian children, teenagers, youth and adults who have attended its services.