Islam began proliferating in Champa from the 11th century, growing more popular after the 1471 Vietnamese conquest of Champa. It replaced or blended with traditional Hindu-Chamic customs. The majority of Cham Muslims in Central Vietnam, including the royal family, were followers of Bani or localized Cham Shiites and still keep practicing Hindu-Chamic traditions, while on the other hand, the Cham Muslims in the Mekong Delta and Cambodia were majority Sunni.