Monarchy of Cambodia in the context of "Norodom Ranariddh"

Phnom Penh is the capital and most populous city of Cambodia. It has been the national capital since 1865 and has grown to become the nation's primate city and its political, economic, industrial, and cultural centre. The city's name derives from Wat Phnom, a Buddhist temple, and Lady Penh, the city's founder. It sits at the confluence of the Tonlé Sap and Mekong rivers, and is the start of the Bassac River. It is also the seat of Cambodia's monarchy, based at the Royal Palace.

Founded in 1372, Phnom Penh succeeded Angkor Thom as the national capital in 1434 following the fall of Angkor, and remained so until 1497. It regained its capital status during the French colonial era. It underwent a period of investment and modernization during Cambodia's independence period, earning the nickname the "Pearl of Asia" for its colonial French, New Khmer and Art Deco architecture. The city's population swelled in the 1960s and 1970s as refugees fled from civil war and American bombing during the Vietnam War. Phnom Penh's entire population was forcibly evacuated in 1975 by the Khmer Rouge, and faced persecution, forced labour and genocide. Phnom Penh remained largely uninhabited during the Democratic Kampuchea era until Vietnam-backed forces took the city in 1979. The city was reconstructed and infrastructure improved in the modern era with the support of international investment and aid. By 2019, it was home to more than 2 million people, approximately 14% of the Cambodian population.

The Kingdom of Cambodia, also known as the First Kingdom of Cambodia, and commonly referred to as the Sangkum period, refers to Norodom Sihanouk's first administration of Cambodia, lasting from the country's independence from France in 1953 to a military coup d'état in 1970. Sihanouk continues to be one of the most controversial figures in Southeast Asia's turbulent and often tragic postwar history. From 1955 until 1970, Sihanouk's Sangkum was the sole legal party in Cambodia. After the 1970 coup, the semi-official name of Cambodia was State of Cambodia, it became a transitional government under a military dictatorship of Prime Minister Lon Nol against the Khmer Rouge and North Vietnamese.

Following the end of World War II, France restored its colonial control over Indochina but faced local resistance against their rule, particularly from Communist guerilla forces. On 9 November 1953, Cambodia achieved independence from France under Norodom Sihanouk but still faced resistance from Communist groups such as United Issarak Front. As the Vietnam War escalated, Cambodia sought to retain its neutrality but in 1965, North Vietnamese soldiers were allowed to set up bases and in 1969, the United States began a bombing campaign against North Vietnamese soldiers in Cambodia. The Cambodian monarchy was abolished in a coup on October 9, 1970 headed by Prime Minister Lon Nol, who established the Khmer Republic which lasted until the Fall of Phnom Penh to the Khmer Rouge led by Angkar ("Organization") when it came to power on 17 April 1975.

The Khmer Republic (Khmer: សាធារណរដ្ឋខ្មែរ, Sathearonaroat Khmae; French: République khmère) was a Cambodian state under the United States-backed military dictatorship of Marshal Lon Nol from 1970 to 1975. Its establishment was formally declared on 9 October 1970, following the 18 March 1970 coup d'état which saw the overthrow of Norodom Sihanouk's government and the abolition of the Cambodian monarchy.

The main cause of the coup was Norodom Sihanouk's tolerance of North Vietnamese military activity within Cambodia's borders; Vietnamese communist forces had gained de facto control over vast areas of eastern Cambodia as a result. Another important factor was the dire state of the Cambodian economy, an indirect result of Sihanouk's policies of pursuing neutrality.

The flag of Cambodia (ទង់ជាតិកម្ពុជា) or the Khmer flag (ទង់ជាតិខ្មែរ) in its present form was originally adopted in 1948 and readopted in 1993, after the Constituent Assembly election in 1993 and restoration of the Cambodian monarchy.

Norodom Sihanouk (/ˈsiː.ənʊk/; 31 October 1922 – 15 October 2012) was a member of the House of Norodom who led Cambodia as King, Chief of State and Prime Minister. He is known as Samdech Euv (meaning "King Father"). During his lifetime, Cambodia was under various regimes, from French colonial rule (until 1953), a Japanese puppet state (1945), an independent kingdom (1953–1970), a military republic (1970–1975), the Khmer Rouge regime (1975–1979), a Vietnamese-backed communist regime (1979–1989), a transitional communist regime (1989–1993) to eventually another kingdom (since 1993).

Sihanouk was the only child of Prince Norodom Suramarit and Princess Sisowath Kossamak, daughter of King Sisowath Monivong. When his grandfather Monivong died in 1941, Sihanouk became king amidst French colonial rule. After the Japanese occupation of Cambodia during World War II, he secured Cambodian independence from France in 1953. He abdicated in 1955 and was succeeded by his father, Suramarit, so as to directly participate in politics. Sihanouk's political organization Sangkum won the general elections that year, and he became prime minister of Cambodia. He governed the country under one-party rule and suppressed political dissent. After his father died in 1960, Sihanouk assumed a new position as Chief of State of Cambodia.

Lon Nol (Khmer: លន់ នល់, also លន់ ណុល; 13 November 1913 – 17 November 1985) was a Cambodian military officer and politician who served as Prime Minister of Cambodia twice (1966–1967; 1969–1971), as well as serving repeatedly as defence minister and provincial governor. As a right-wing nationalist, he led the military coup of 1970 against Prince Norodom Sihanouk, abolished the monarchy, and established the short-lived Khmer Republic. Constitutionally a semi-presidential republic, Cambodia was de facto governed under a military dictatorship. He was the commander-in-chief of the Khmer National Armed Forces during the Cambodian Civil War and became President of the Khmer Republic on 10 March 1972. On 1 April 1975, as the only president of the republic 16 days before Angkar and the Khmer Rouge captured Phnom Penh, Lon Nol fled to Indonesia and later the United States, first to Hawaii and then to California, where he remained until his death in 1985.

The Royal Palace of Cambodia (Khmer: ព្រះបរមរាជវាំង) is a complex of buildings which serves as the official royal residence of the King of Cambodia. Its full name in Khmer is the Preah Barom Reacheaveang Chaktomuk Serey Mongkol (Khmer: ព្រះបរមរាជវាំងចតុមុខសិរីមង្គល). The Cambodian monarchs have occupied it since it was built in the 1860s, with a period of absence when the country came into turmoil during and after the reign of the Khmer Rouge.

The palace was constructed by King Norodom between 1866 and 1870; this original palace was largely demolished and rebuilt between 1912 and 1932, It is situated at the Western bank of the confluence of the Tonle Sap River and the Mekong River called Chaktomuk (an allusion to Brahma).

After decades of conflict, Cambodia's current form of government began in 1993 with the restoration of the monarchy and end of the State of Cambodia and the United Nations Transitional Authority after general elections were held. Since 1993, the Cambodian People's Party have consistently been in government, and consolidated power in a 1997 coup d'état. Hun Sen was prime minister until transfer of power to his son, Hun Manet, in 2023.