This document provides a timeline of major events in the early church, middle ages, reformation period, and modern church alongside corresponding events in society and empires. Some key religious events include Pentecost, the Councils of Nicaea and Chalcedon, the beginning of basilica worship, the Eastern Schism, the Crusades, the Reformation led by Luther and Calvin, Vatican I, and Vatican II. Major social developments featured include the fall of Rome, the rise of feudalism, the Renaissance, the voyages of discovery, the world wars, and the computer/space ages.