In 330 AD, Constantine I allowed Christianity to be practiced publicly, dedicated Constantinople as the capital of the Empire, and rebuilt the city splendidly. Constantinople itself was not only the new capital of the Empire but was also the symbol of Christian triumph.


Constantinople, later known as Byzantium and modern-day Istanbul in Turkey, has a long and complex history of foundation and development. The city was founded in antiquity and went through several significant phases before becoming the capital of the Byzantine Empire under the name Constantinople. Here’s a brief overview of its founding and early history:

Foundation of Byzantium:

  • The city’s origins trace back to ancient Greek colonization in the 7th century BCE. It was originally known as Byzantium, named after its legendary founder Byzas, a Megarian Greek.
  • Located strategically on the European side of the Bosporus Strait, Byzantium was positioned at the crossroads of Europe and Asia, making it an important center for trade and commerce.

Roman Period:

  • In 196 CE, Byzantium became part of the Roman Empire during the reign of Emperor Septimius Severus.
  • During the reign of Emperor Constantine the Great, in the early 4th century CE, the city underwent significant development and expansion.

Foundation of Constantinople:

  • The city’s most significant transformation occurred when Emperor Constantine the Great chose it as the new capital of the Roman Empire in 330 CE. He renamed it Constantinople in his honor.
  • ConstantinopleThis decision was motivated by its strategic location, which allowed for better defense, easier control of the Eastern Roman Empire (Byzantine Empire), and proximity to important trade routes.
  • Constantinople became the new political, cultural, and economic center of the Eastern Roman Empire, often referred to as the Byzantine Empire.

Development and Legacy:

  • Constantinople was fortified and expanded, becoming one of the most splendid cities in the world during the Byzantine period.
  • It served as the capital of the Byzantine Empire for over a millennium, from 330 CE until its fall to the Ottoman Turks in 1453.
  • The city was known for its architectural marvels, including the Hagia Sophia and the Theodosian Walls.
  • It played a crucial role in preserving and transmitting classical Greek and Roman knowledge to later generations, making it a center of learning and culture.

In 1453, Constantinople fell to the Ottoman Empire, marking the end of the Byzantine Empire and the beginning of its transformation into Istanbul, the capital of the Ottoman Empire.

The founding of Constantinople was a pivotal moment in history, as it marked the shift of the Roman Empire’s power from Rome to the eastern part of the empire and laid the foundation for the Byzantine Empire’s long and influential existence.

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