Final answer:
Christianity underwent significant transformations from 1450 to 1750, including the Reformation leading to the Protestant movement, while maintaining continuity in the church's structure. The Black Death and the Age of Exploration also influenced the development and spread of Christianity during this period.
Step-by-step explanation:
The changes and continuities in Christianity during 1450 - 1750 witnessed significant transformation due to events such as the Reformation, the Age of Exploration, and the social and economic impacts of the Black Death. One major continuity was the maintenance of the church's structure and authority, though this was challenged and diversified significantly by the Reformation, which led to the creation of Protestant denominations and questioned the singular authority of the Roman Catholic Church.
The Reformation emphasized individual freedom of belief and practices that deviated from the Catholic tradition. Despite these changes, the Church remained a central institution in society. In the wake of the Black Death, which devastated Europe's population, the Christian Church played a critical role in maintaining social order and spiritual life. Additionally, the Age of Exploration saw Christianity spread worldwide as European explorers carried their religious beliefs to new continents.