Greek Orthodox Christianity was the dominant one. However, there were several dissident creeds, such as the Arianism. The Othodox church declared these heresies.
Christianity developed from a religion among a small group of Jews (who lived in Judea, which was part of the Roman Empire) into a mass religion in the Roman days. It spread around the Roman Empire. It became state religion. Catholic Christianity and Orthodox Christianity developed during the Later Roman Empire. They were originally called Latin or Western Christianity and Greek or Eastern Christianity respectively. The former was the main form of Christianity in the western part of the Roman Empire and the latter was the main form of Christianity in the eastern part of the Roman Empire.
orthodox Christianity
There was only one Roman Empire. Moreover, the Roman Empire did not study Christianity. An empire cannot study. The Roman Empire was where Christianity spread from Judea (which was a part of the Roman province of Syria). Both Catholic and Orthodox Christianity developed in the Roman Empire. Originally the were called Latin or Western Christianity and Greek or Eastern Christianity respectively. The former was the dominant form of Christianity in the western part of the Roman Empire and the latter was the dominant form of Christianity in the eastern part of this empire. There were also dissident Christian doctrines and sects.
Orthodox Christianity.
No it was not. Christianity is a lagacy if he Romans. It developed during the Roman days and became the state religion of the Roman Empire. By the time of the fall of the western part of the Roman Empire (the eastern part of the Roman Empire continued to exist for nearly 1,000 years) the Catholic and the Orthodox churches had already developed. Their original names were Latin or Western Church and Greek or Eastern Church respectively. The former was the main form of Christianity in the western part of the empire and the latter was the main form of Christianity in the eastern part.
Christianity started in Judea, which was part of the Roman Empire. The Apostles and other preachers travelled around the Roman Empire (mainly the eastern part, in the eastern Mediterranean). A Christian clergy headed bishops developed. Paul the Apostle created the foundation of the Christian doctrine. Other important theologians, who are called the 'Fathers of the Church' developed the Christian doctrine further. Christianity developed into two main forms: Greek or Eastern Christianity, which was the main form of Christianity in the eastern part of the Roman Empire, and Latin or Western Christianity, which was the main form of Christianity in the western part of the empire. Later they came to be called Orthodox and Catholic respectively. There were 'Fathers of the Church' in both Greek and Latin Christianity. There was also a number of dissident Christian doctrines. The most important of these was Arian Christianity, which was quite popular around the Roman Empire. Latin and Greek Christianity became the official religion of the Roman Empire thanks to their endorsement by the emperors of the later Roman Empire and the persecution of dissident Christian doctrines and pagan religions by some of these emperors.
The form of Christianity based on Greek heritage practiced in the Byzantine Empire is Eastern Orthodox.
The term Byzantine Empire has been coined by historians to indicate the eastern part of the Roman Empire after the fall of the western part of this empire. The 'east' continued to exist for nearly 1,000 years after the fall of the 'west.' The people in question did not even know the term "Byzantine" and called their empire Roman Empire. In other words, the so-called Byzantine Empire was the continuation of the Roman Empire. The so-called Byzantines saw themselves as Romans. The religion of the eastern part of the Roman Empire had developed before the fall of the western part of this empire. It was called Greek or Eastern Christianity, and it was the main form of Christianity in this part of the empire. The main form of Christianity in the western part of the empire was called Latin or Western Christianity. Later, they came to be called Orthodox and Catholic respectively.
Christianity faced periods of persecution. However, it was later endorsed by the emperors, which supported it and persecuted paganism. Christianity became the state religion of the empire. In fact, Christianity developed in the Roman Empire. Two main forms developed: Latin or Western Christianity, which was the main form of Christianity in the western part of the empire and Greek or Eastern Christianity, which was the main form of Christianity in the eastern part of the empire. Later they came to be called Catholic and orthodox respectively. Romans society took on the creed and values of Christianity. Early Christianity took on Roman and Greek symbols, art and terminology.
I would say religion was the ancient Romans' most significant contribution to Europe. Christianity developed from a religion among a small group of Jews (who lived in Judea, which was part of the Roman Empire) into a mass religion in the Roman days. It spread around the Roman Empire. It became state religion. Catholic Christianity and Orthodox Christianity developed during the Later Roman Empire. They were originally called Latin or Western Christianity and Greek or Eastern Christianity respectively. The former was the main form of Christianity in the western part of the Roman Empire and the latter was the main form of Christianity in the eastern part of the Roman Empire.
The religion of the Byzantine empire was Orthodox Christianity For a while Arian Christianity was popular but it was soon suppressed. Both of these religions developed before the Byzantine Empire. Byzantine Empire is a term historians have coined to refer to the eastern part of the Roman Empire after the fall of the western part of the Roman Empire. The Romans, even in the so-called Byzantine period did not use this term. They used only one tern: Roman Empire. Orthodox and Arian Christianity developed before the fall of the western part of the empire and therefore before the Byzantine period. There were Western or Latin Christianity in the western part of the Roman Empire and Greek or Eastern Christianity,in the western part of the Roman Empire. They were the mainstream form of Christianity Later they came to be called Catholic and Orthodox respectively Arian Christianity was the most popular form of dissident Christianity both in the eastern and western part of the Roman Empire.
The Romans have given us Christianity. This religion originated in Judea, which was part of the Roman Empire and then spread though this empire. It evolved into two main forms, which were called Latin/western Christianity and Greek/eastern Christianity. The former was the main form of Christianity in the western part of the empire and the latter was the main form in the eastern part of the empire. Later they came to be called Catholic and Orthodox respectively.