Cambodia's modern-day culture has its roots in the 1^st to 6^th centuries in a state referred to as  Funan, known as the oldest Indianized state in southeast Asia. It is from this period that evolved. Cambodia's language, part of the Mon-Khmer family, which contains elements of Sanskrit, its  ancient religion of Hinduism and Buddhism. Historians have noted, for examples, that Cambodians  can be distinguished from their neighbors by their clothing - checkered scarves known as kramas  are worn instead of straw hats. Funan gave way to the Angkor Empire with the rise to power of King Jayavarman II in 802. The following 600 years saw powerful Khmer kings dominate much of present day Southeast Asia, from the borders of Myanmar east to the South China Sea and north to Laos. It was during this period that Khmer king built the most extensive concentration of religious temple complex. The most successful of Angkor's king, Jayavarman II, Indravarman I, Suryavarman II and Jayavarman VII, also devised a masterpiece of ancient engineering: a sophisticated irrigation system that includes barays (gigantic man-made lakes) and canals that ensured as many as three rice crops a year. Part of this system is still in use today. As the Angkor period ended, Cambodia's capital moved south to Longvek, then to Udong, and finally to the present-day capital of Phnom Penh. Among the main features of the capital, was a widespread conversion to Theravada Buddhism, illustrated on temple carvings, where Buddhist features gradually replaced Hindu features.The 15^th to 17^th centuries represented a time of feign influence, when expansionists Siam and Vietnam fought over Cambodia by the mid- 1800, Cambodia, like most other countries in Asia, came under increasing pressure from European colonial powers. In 1863, the country agreed to protection from France. King Norodom signed a Protectate Treaty between King Norodom and the French.