The Malacca Sultanate was a Malay sultanate based in the modern-day state of Malacca, Malaysia. Conventional historical thesis marks c. 1400 as the founding year of the sultanate by King of Singapura, Parameswara, also known as Iskandar Shah, although earlier dates for its founding have been proposed. At the height of the sultanate's power in the 15th century, its capital grew into one of the most important transshipment ports of its time, with territory covering much of the Malay Peninsula, the Riau Islands and part of the central eastern coast of Sumatra in present-day Indonesia.