The Sultanate of Demak was a significant Islamic kingdom in Java, Indonesia, established in the late 15th century. It played a crucial role in the spread of Islam in the region and was known for its strong maritime trade. The sultanate's capital was located in Demak, which became a center for Islamic learning and culture. Demak was founded by Raden Patah, who is considered the first sultan. The sultanate reached its peak in the early 16th century, influencing neighboring regions and contributing to the rise of other Islamic states in Java, such as Mataram and Cirebon.