Final answer:
The Roman Catholic Church dominated religious life in Europe in the 1400s, influencing not just religious affairs but also political, social, educational, and cultural aspects of life.
Step-by-step explanation:
The institution that dominated religious life in Europe in the 1400s was the Roman Catholic Church. This church wielded a significant amount of power and had a major influence on virtually all aspects of life during the Middle Ages. Its supremacy extended not only over religious matters but also political and social affairs. It served as the main source of spiritual guidance for people and was a central authority in interpreting scriptures and defining religious doctrines. The Church also played a significant role in education, art, and science during the time.
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