Since around 1850, the Cambodian flag has featured a depiction of Angkor Wat in the centre. The current flag, with a blue bonce in 1948. It was used until 9 October 1970, when a new flag was introduced for Lon Nol's Khmer Republic that lasted until the takeover of the Khmer Rouge in 1975. The subsequent state of Democratic Kampuchea, which existed from 1975 to 1979, used a red flag with a three-towered Angkor Wat design retained in yellow beginning in 1976. The People's Republic of Kampuchea was established in 1979, after the Vietnamese invasion of Cambodia.