- Christians mark the descent of the Holy Spirit on Jesus' Apostles in A.D. 30 as the birth of the Church. Over the next 50 years, the New Testament was written, and Christian communities sprang up in the Mediterranean. Christians were persecuted until A.D. 313, when the Roman Emperor Constantine legalized the religion.
- Constantine moved the Roman Empire's capital east, to Constantinople. Meanwhile, Christianity spread in Western Europe, where Benedict founded monasteries and Jerome translated the Bible from Hebrew into Latin.
- This period opens with the split between the Eastern and Roman Churches, followed by the Crusades---violent attempts to save Palestinian holy places. It ends with the Inquisition, which sought to destroy heresies.
- Martin Luther sparked the Protestant Reformation by nailing 95 theses to the doors of a German church in 1517. The Church responded with the Council of Trent, making needed reforms. Missionaries were sent to the Americas and China.
- In 1869, The First Vatican Council--or Vatican I--defined papal infallibility. In the 1960s Vatican II produced profound liturgical changes. Pope John Paul II made 20th century history by helping restore relations between the Roman and Eastern Churches.













