The Pahang Sultanate (Malay: Kesultanan Pahang, Jawi: كسلطانن ڤهڠ ) also referred as the Old Pahang Sultanate, as opposed to the Modern Pahang Sultanate, was a Malay Muslim state established in the eastern Malay peninsular in 15th century. At the height of its influence, the Sultanate was an important power in Southeast Asian history and controlled the entire Pahang basin, bordering to the north, the Pattani Sultanate, and adjoins to that of Johor Sultanate to the south. To the west, it also extends jurisdiction over part of modern-day Selangor and Negeri Sembilan.