Answer:
Mecca was an important trade and spiritual center of Arabian Peninsula, where the famous sanctuary Kaaba was built. Muhammad who was born in Mecca started preaching new religion there, but was opposed by the local leaders, who were afraid of his influence.
Eventually, Muhammad had to run away from Mecca, but he returned triumphally to the city, which became a sacred city for Muslims, while Kaaba became a sanctuary for only true God - Allah.
Step-by-step explanation:
Even today is regarded as one of the sacred places of Islam.
On the other side, every true believer is obliged to visit Kaaba at least once during the year.