The Sultanate of Siak was a historical Malay state located in present-day Indonesia, specifically in the Riau province. Established in the 17th century, it became a significant center for trade and Islamic culture in the region. The sultanate played a crucial role in the spice trade and maintained relations with various other states, including the Dutch East India Company. Siak's capital, Siak Sri Indrapura, was known for its grand palaces and vibrant culture. The sultanate was ruled by a series of sultans, with the last one reigning until the early 20th century when it was absorbed into the Dutch colonial empire. Today, remnants of its rich history can still be seen in the region.