Answer: He gave all Christians the freedom to practice their religion.
Step-by-step explanation:
Mehmed II believed that there should be no coercion in the faith, so he gave all the Christians he found in Constantinople after conquering the city a guarantor of freedom of religion. This act is important because of the coexistence of a large number of people who were in Constantinople at that time. Mehmed II immediately made Constantinople the capital of the empire; his goal was to make the Ottoman capital a modern city.