Final answer:
The Ottoman Empire was mostly tolerant of other religions and ethnic groups, allowing dhimmis to govern their affairs according to their religious laws.
Step-by-step explanation:
One empire that was mostly tolerant of other religions and ethnic groups was the Ottoman Empire. At its height, the Ottoman Empire exerted dominance over a vast expanse of territory that included not only Muslims but also many dhimmis, such as Christians and Jewish people.
The Ottomans implemented the millet system, which allowed dhimmis to govern their affairs according to their religious laws.