Constantine's accomplishments were making Christianity the official religion of the empire & founding Constantinople (Istanbul).
Constantinople
The use of Mosaics (glass collages) In both public and religious buildings. The most famous Byzantine building is the Hagia Sophia, a domed church built during the reign of Justinian and Constantinople.
Constantinople was in Greece.
The ancient city of Constantinople has morphed into Istanbul.The ancient city of Constantinople has morphed into Istanbul.The ancient city of Constantinople has morphed into Istanbul.The ancient city of Constantinople has morphed into Istanbul.The ancient city of Constantinople has morphed into Istanbul.The ancient city of Constantinople has morphed into Istanbul.The ancient city of Constantinople has morphed into Istanbul.The ancient city of Constantinople has morphed into Istanbul.The ancient city of Constantinople has morphed into Istanbul.
I think I will travel to Constantinople.
constantinople was not a religion but a city.
Constantinople
Constantinople is a town in southern Chile.
The conquest of Constantinople
The Ecumenical Patriarch (in Constantinople).
Socrates of Constantinople was born in the year 380 AD.