Constantine is famous primarily for being the first Roman emperor to convert to Christianity, a landmark that transformed both the Roman Empire and world history[5][6]. He ended the persecution of Christians by issuing the Edict of Milan in 313 CE, granting religious tolerance throughout the empire and legalizing Christianity, which had previously faced intense repression[4][6].
Another of Constantine’s major achievements was the founding of Constantinople (modern Istanbul) in 330 CE as the new capital of the Roman Empire. Its strategic location helped the city thrive, and Constantinople would endure as the capital of the Byzantine (Eastern Roman) Empire for over a thousand years[1][3][4]. The city’s founding fundamentally shifted the empire’s center of power eastward and influenced the political, economic, and religious landscape of Europe and Asia for centuries[2][3].
Constantine’s reign was marked by significant reforms that stabilized and strengthened the empire. These included reorganizing the Roman military, introducing a new gold coin (the solidus) that would remain a standard of economic stability for centuries, and restructuring the imperial administration[1][3][5]. His military success and consolidation of power allowed him to become sole ruler of the empire by 324 CE after years of civil war and rival emperors[5].
Additionally, Constantine invested in public works, commissioning major construction projects such as the Arch of Constantine in Rome—built to commemorate his victory over Maxentius—and many important churches across the empire[1][7]. His legal reforms included promoting moral legislation, ending crucifixions, and improving the legal status of slaves[1].
Constantine is not just remembered for his faith or administrative reforms but also for setting the foundation for “Christian Rome.” He supported church-building efforts and presided over the Council of Nicaea in 325 CE, which helped define orthodox Christian doctrine[2]. Despite his promotion of Christianity, Constantine maintained some connections with Rome’s traditional religious institutions during his reign[4].
References
- [1] Constantine the Great | Biography, Facts & History – Lesson
- [2] 10 Achievements of Constantine I the Great
- [3] Who Was Constantine the Great? Accomplishments & …
- [4] Constantine the Great: What Went Wrong?
- [5] Constantine the Great | Biography, History & …
- [6] Constantine the Great
- [7] Constantine I | Biography, Accomplishments, Death, & Facts