The fire broke out on the same day Orthodox Christians around the world celebrated Easter. Hours before the fire, more than 1,000 people were inside in services between 10 a.m. and 12 p.m. to celebrated Easter.
The church was built in the early 1850s and was designated a city landmark in 1968.
At least 170 firefighters and 36 vehicles arrived on the scene to combat the flames. Plumes of smoke poured out of the church.
After six days it was not clear if any of the structure could be saved and repaired.