Islamic religious ceremonies, festivals and also Islamic customs – the prince's circumcision for example, were observed faithfully and held in such great importance and festivities. After the sultan, the qadi or religious judge of Banten, also holds authoritative power and enjoyed important position within Banten's court. Numbers of ulamas hailed from India and Arabia were invited to Banten to spread their knowledge in religious matters. The pesantren religious school were established in the kingdom, with the pesantren of Kasunyatan was among the most prestigious one, established south of the city in the 16th century under the patronage of king Maulana Muhammad and was led by the king's own religious teacher.