Surabaya, Indonesia's second-largest city, houses magnificent Islamic architecture including the historic Al-Akbar Mosque with its towering 99-meter minaret and the centuries-old Ampel Mosque built by Sunan Ampel. The city holds profound Islamic significance as one of the centers where Wali Songo (Nine Saints) spread Islam across Java, with the Ampel district serving as a major pilgrimage site. Surabaya's vibrant Muslim community maintains rich cultural traditions through Islamic education centers, traditional markets, and religious festivals that reflect the harmonious blend of Islamic and Javanese heritage.