Jerusalem (Hebrew: , Yerushaláyim or Yerushalaim; Arabic: , al-Quds ("the Holy")) is Israel's capital and largest city both in population and area, with a population of approximately 724,000 (as of 2006) and an area totaling 123 square kilometers (47 sq mi). Located in the Judean Mountains between the Mediterranean Sea and the Dead Sea, Jerusalem is considered a holy city in three major religions – Judaism, Christianity, and Islam. Jerusalem has been the holiest city in Judaism and the spiritual homeland of the Jewish people since the 10th century BCE. The city is often regarded as the third-holiest in Islam and it contains a number of significant and ancient Christian landmarks. Thus, while the city has a large Jewish majority, a wide range of national, religious, and socioeconomic groups are represented. The walled area of Jerusalem, which until the late 19th century formed the entire city, is now called the Old City and has been proposed as a UNESCO World Heritage Site. It consists of four ethnic and religious sections – the Armenian, Christian, Jewish, and Muslim Quarters.