The body of former King Norodom Sihanouk has been returned to Cambodia for a week of official mourning.
His coffin was flown from the Chinese capital Beijing, where he died on Monday of a heart attack aged 89.
Tens of thousands of people lined the streets near the airport in the capital, Phnom Penh, as the plane carrying Sihanouk's body touched down.
Grieving Cambodians wore white shirts with black ribbons, and flags flew at half-mast after the news of his death.
In the capital, students sang songs before offering flowers at the royal palace.
"In the king's whole life, whatever he did was for the country, not for himself," Lay Rithiya, a law student, told Reuters news agency.
"So we are here to mourn him and we consider that he is a hero and I have never had this sadness in 20 years."
Officials from the US, China, North Korea, Japan and other countries have also sent messages of condolence.
Sihanouk's widow, Queen Monique, held hands with her son, King Norodom Sihamoni, as they emerged from the plane carrying the former king's body when it touched down at Phnom Penh earlier on Wednesday.
Monks chanted prayers as the coffin, decked with white flowers, was brought out of the plane.
The queen wore the traditional mourning clothes of a white shirt and black skirt, and throngs of similarly dressed mourners waved Cambodian flags along the coffin's route to the royal palace.
Sihanouk's body will lie in state at the palace for three months before an elaborate funeral and cremation, said the government.
The government has ordered all radio and television stations to refrain from broadcasting any programmes that may be deemed inappropriate during the mourning period.
Sihanouk became king in 1941 while still a teenager, and led Cambodia to independence from France in 1953.
He was a presence through decades of political and social turmoil in Cambodia, despite long periods of exile overseas.
In later life he emerged as a peacemaker who helped bring stability back to his country, after an ill-fated choice to back the Khmer Rouge in its early years.
He remained an influential figure in his country, despite his abdication in 2004 in favour of his son King Norodom Sihamoni.