Kassala is renowned for its magnificent Grand Mosque with distinctive twin minarets and traditional Islamic architecture that reflects the city's rich spiritual heritage. The city has historically served as an important center for Islamic learning and Sufi traditions, particularly known for its connection to various Sufi orders and religious scholars. Kassala's vibrant Muslim community maintains strong cultural traditions, including traditional Islamic festivals, religious markets, and serves as a gathering point for diverse ethnic groups united by their Islamic faith.