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https://en.wikipedia.org/wiki/Demak_Sultanate
The Demak Sultanate (کسلطانن دمق) was a Javanese Muslim state located on Java's north coast in Indonesia, at the site of the present-day city of Demak.[2] A port fief to the Hindu-Buddhist Majapahit kingdom thought to have been founded in the last quarter of the 15th century, it was influenced by Islam brought by Muslim traders from China, Gujarat, Arabia and also Islamic kingdoms in the region, such as Samudra Pasai, Malacca and Bani (Muslim) Champa. The sultanate was the first Muslim state in Java, and once dominated most of the northern coast of Java and southern Sumatra.[3]
Although it lasted only a little more than a century, the sultanate played an important role in the establishment of Islam in Indonesia, especially on Java and neighboring areas.