Bahrain , officially the Kingdom of Bahrain, is a small island country situated near the western shores of the Persian Gulf. It is an archipelago with Bahrain Island, the largest land mass, at long by wide. Saudi Arabia lies to the west and is connected to Bahrain by the King Fahd Causeway while Iran lies to the north across the Persian Gulf. The peninsula of Qatar is to the southeast across the Gulf of Bahrain. The population in 2010 stood at 1,234,571, including 666,172 non-nationals. Bahrain is the site of the ancient land of the Dilmun civilisation.Saudi Aramco World : Oman: The Lost Land Bahrain was one of the earliest areas to convert to Islam in 628 AD. Following a period of Arab rule, Bahrain was occupied by the Portuguese in 1521, who in turn were expelled in 1602 by Shah Abbas I of the Safavid dynasty under the Persian Empire. In 1783, the Bani Utbah clan captured Bahrain from Nasr Al-Madhkur and 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, Bahrain declared independence. Formerly a state, Bahrain was declared a Kingdom in 2002. Since early 2011, the country has experienced sustained protests and unrest inspired by the regional Arab Spring, particularly by the majority Shia population. Bahrain has the first post-oil economy in the Persian Gulf. Since the late 20th century, Bahrain has invested in the banking and tourism sectors. The country’s capital, Manama, is home to many large financial structures. Bahrain has a high Human Development Index (ranked 48th in the world) and was recognised by the World Bank as a high income economy.