The Opera House in Yerevan, St. Gregory Cathedral (Zvartnots) in Vagharshapat (5-7th centuries), Tufenkian Old Dilijan Complex in Dilijan (19-20th centuries) and the Monument “Mother Armenia” in Gyumriare among the list of over 200 iconic monuments, buildings, museums, bridges and other landmarks in nearly 60 countries around the world that were lit up blue on October 23-24.
