Jamaica is an island country situated in the Caribbean Sea. Spanning in area, it is the third-largest island of the Greater Antilles and the Caribbean (after Cuba and Hispaniola). Jamaica lies about south of Cuba, and west of Hispaniola (the island containing the countries of Haiti and the Dominican Republic); the British Overseas Territory of the Cayman Islands lies some to the north-west. Originally inhabited by the indigenous Arawak and Taíno peoples, the island came under Spanish rule following the arrival of Christopher Columbus in 1494. Many of the indigenous people were either killed or died of diseases to which they had no immunity, and the Spanish thus forcibly transplanted large numbers of African slaves to Jamaica as labourers. with an economy heavily dependent on tourism; it has an average of 4.3 million tourists a year. Politically it is a Commonwealth realm, with Elizabeth II as its queen. Her appointed representative in the country is the Governor-General of Jamaica, an office held by Patrick Allen since 2009. Andrew Holness has served as Prime Minister of Jamaica since March 2016. Jamaica is a parliamentary constitutional monarchy with legislative power vested in the bicameral Parliament of Jamaica, consisting of an appointed Senate and a directly elected House of Representatives.