Jerusalem attracts millions of visitors each year not only for its religious significance as a holy city for Judaism, Christianity, and Islam, but also for its rich historical sites. Some of the most impressive landmarks include the Dome of the Rock mosque, built over 1300 years ago with its golden dome and colorful marble, and the Church of the Holy Sepulchre, which contains shrines for different Christian denominations. Outside the Old City, Western Jerusalem contains many museums, markets, and evidence of the customs brought by Jewish immigrants from around the world. To promote tourism of the city's cultural heritage, a Palestinian tourism company offers week-long package tours that visit important historical sites in Jerusalem and other Palestinian cities.