Bahrain , officially the Kingdom of Bahrain (Arabic: مملكة البحرين‎ Mamlakat al-Baḥrayn), is a country in the Persian Gulf. The island nation comprises a small archipelago made up of 70 natural islands and an additional 33 artificial islands, centered around Bahrain Island which makes up around 83 percent of the country's landmass. The country is situated between the Qatari peninsula and the north eastern coast of Saudi Arabia to which it is connected by the 25-kilometre (16 mi) King Fahd Causeway. According to the 2020 census, Bahrain's population numbers 1,501,635 people, of which 712,362 are Bahraini nationals. At 760 square kilometres (290 sq mi) in size, it is the third-smallest nation in Asia after the Maldives and Singapore. The capital and largest city is Manama. Bahrain is the site of the ancient Dilmun civilization. It has been famed since antiquity for its pearl fisheries, which were considered the best in the world into the 19th century. Bahrain was one of the earliest areas to convert to Islam, during the lifetime of the Prophet Muhammad in 628 CE. Following a period of Arab rule, Bahrain was ruled by the Portuguese Empire from 1521 until 1602, following the conquest by Shah Abbas I of the Safavid dynasty. In 1783, the Bani Utbah clan captured Bahrain from Nasr Al-Madhkur and it has since been ruled by the Al Khalifa royal family, with Ahmed al Fateh as Bahrain's first hakim. In the late 1800s, following successive treaties with the British, Bahrain became a protectorate of the United Kingdom. In 1971, it declared independence. Formerly an emirate, Bahrain was declared an Islamic constitutional monarchy in 2002. In 2011, the country experienced protests inspired by the regional Arab Spring. Bahrain's ruling Al Khalifa royal family has been criticised for violating the human rights of groups including dissidents, political opposition figures, and its majority Shia Muslim population.