7. Decline of Feudalism: The Renaissance was able to flourish because the Feudalism was declining. The cause of decline of feudalism was the rise of middle class and their support to the kings. It was this middle class which promoted Renaissance only when the feudalism declined.
8. Occupation of Constantinople by the Turks:In 1453, the Turkish Empire occupied Constantinople, the capital of Byzantine Empire (Eastern Roman Empire of ancient times). Secondly, the Constantinople was great center of knowledge, philosophy and art. The Turks loved to fight but they had no love and utility for anything that could enhance their knowledge. Thousand of Greek scholars, philosophers and artists of this city were forced to migrate to other countries like Italy, France, Germany, England etc. in search of livelihood. They also took away to these countries the ancient Greek and Roman knowledge, science and a new way of thinking along with them. One cardinal brought 800 manuscripts to Italy. Thus, we can say that the fall of Constantinople