Yī líng wǔ sì nián, Dōngzhèngjiào hé Tiānzhǔjiào zhèngshì fēnliè.
In 1054 the Orthodox and Catholic churches formally split.
Tips
usage
Chinese divides Christianity into three main branches: 天主教 (Catholicism), 东正教 (Orthodoxy) and 新教 (Protestantism). In everyday speech 基督教 usually means Protestantism alone.
memory
正教 "right teaching" renders "Orthodox", which means "right belief", and 东 "eastern" marks it as the church of the Greek-speaking East.
