Bordering the Arabian Sea, the sultanate of Oman, known for its crystal-clear waters, vast desert and mountain ranges, has positioned itself as the Gulf's discreet mediator.
It is the country's natural beauty and historical sites that have helped double the number of tourists in the past eight years, according to government statistics.
But many Western and Arab diplomats see the sultanate as a model of balance on regional issues.
Here are some key facts about the sultanate, whose population stands at 4.6 million, almost half of whom are expatriates:
Sultan Qaboos bin Said, who died on Friday at the age of 79, transformed the former Arabian Peninsula backwater into a modern state while shielding it from much of the region's turmoil by adopting a moderate approach on foreign policy.
This model of balance has led many Western nations to repeatedly turn to Muscat to act as a mediator in resolving thorny regional issues -- from the kidnapping of Americans and Europeans to the 2015 Iran nuclear deal.
Oman also mediated between Tehran and Washington for prisoner releases, including the freeing of three US hikers jailed in Iran on suspicion of being spies after they strayed across the border in 2009.
Although it is a member of the Saudi-dominated Gulf Cooperation Council (GCC), Oman is the only Gulf country not to have taken part in the Saudi-led military coalition's fight against Yemen's Iran-aligned Huthi rebels.
More than four years after the war broke out between the Saudi-backed government and the rebels, Oman remains a neutral ground where the two sides have convened for talks on prisoner swaps.
Oman was also the first Gulf state to receive Israeli Prime Minister Benjamin Netanyahu, in October 2018.
Egypt and Jordan are the only Arab countries to have formally established diplomatic ties with the Jewish state.
The sultanate is strategically located on the Strait of Hormuz -- the narrow seaway through which much of the world's oil supply passes -- between regional rivals Iran and Saudi Arabia and maintains good relations with both.
In 2019, Oman -- at the mouth of the Gulf -- said it signed an agreement with the United States that would allow American ships and warplanes to take advantage of its ports and airports.
At the mouth of the Gulf, the strait is crucial to global energy supplies, with about a third of the world's seaborne oil passing through it every day.
Shiite Iran has repeatedly threatened to block the strait amid tensions with Sunni-ruled Gulf nations, including Saudi Arabia.
Oman is the biggest oil producer in the Middle East outside OPEC, producing 1 million bpd.
In 1991, Qaboos, the longest-reigning ruler of the modern Arab world, offered a modicum of democracy, creating a Consultative Council with elected members to complement the State Council -- whose members he appointed.
Qaboos slightly expanded the council's powers in 2011 after unprecedented social unrest in the Gulf Arab country.
It elected its speaker for the first time and assumed the power to grill ministers but has no role in defence, internal security or foreign affairs.
Israeli Prime Minister Binyamin Netanyahu responded Saturday to the news of the Sultan's death.
"I send condolences to the people of Oman and share their grief over the passing of Sultan Qaboos bin Said. About a year ago, he invited my wife and me to an exceptionally important and very moving visit, in which he offered his assistance in promoting peace and stability in the region."
"He was a great leader who worked tirelessly to promote peace and stability in our region. Under his leadership, Oman became a significant and advanced country.
"I congratulate the new Sultan, Haitham bin Tariq al-Said, on his appointment and for his statement that Oman's foreign policy and its activities for peace in the region will continue."
Israel and Oman agreed to open trade representative offices in the 1990s, but in 2000 the Gulf sultanate closed them after the outbreak of the Second Intifada.