Christian culture generally includes all the cultural practices which have developed around the religion of Christianity. There are variations in the application of Christian beliefs in different cultures and traditions. Christianity rapidly expanded into Europe, Syria, Mesopotamia, Asia Minor, Egypt, Ethiopia, and India and by the end of the 4th century had also become the official state church of the Roman Empire. Christian culture has influenced and assimilated much from the Greco-Roman Byzantine, Western culture, Middle Eastern, Slavic, Caucasian, and possibly from Indian culture.