A new city-state known as Ayutthaya, named after the Indian city of Ayodhya, was founded by Ramathibodi (a descendant of Chiang Mai) and emerged as the center of the growing Thai Empire starting in 1350. Inspired by the then Hindu-based Khmer Empire (Cambodia), the Ayutthaya Empire's continued conquests led to more Thai settlements as the Khmer Empire weakened after their defeat at Angkor in 1444. During this period, the Thai developed a feudal system as various vassal states paid homage to the Thai kings. Even as Thai power expanded at the expense of the Mon and Khmer, the Thai Ayutthaya faced setbacks at the hands of the Malay at Malacca and were checked by the Toungoo of Burma.