Arusha City is a Tanzanian city, with a population of 617,631, and the regional capital of the Arusha Region, with a population of 2,356,255 (2022 census). Located below Mount Meru on the eastern edge of the eastern branch of the Great Rift Valley, Arusha City has a temperate climate. The city is close to the Serengeti National Park, the Ngorongoro Conservation Area, Lake Manyara National Park, Olduvai Gorge, Tarangire National Park, Mount Kilimanjaro, and Mount Meru in the Arusha National Park. The city is a major international diplomatic hub. It hosts the African Court of the African Union and is the capital of the East African Community. From 1994 to 2015, the city also hosted the International Criminal Tribunal for Rwanda, but that entity has ceased operations. Currently, it hosts one of the headquarters of the International Residual Mechanism for Criminal Tribunals. Arusha is a multicultural city with a majority Tanzanian population of mixed backgrounds: indigenous African, Arab-Tanzanian and Indian-Tanzanian population, plus a small European and North American minority population. Religions of the Arusha city population include Christianity, Islam, Sikhism and Hinduism. The current site of Arusha was first settled in the 1830s by the agro-pastoral Arusha Maasai from the Arusha Chini community, south of Mount Kilimanjaro. They traded grains, honey, beer, and tobacco with the pastoral Kisongo Maasai in exchange for livestock, milk, meat, and skins. Demand for Arusha's foodstuffs increased substantially during the 1860s when the Pangani Valley trade route was extended through Old Moshi, Arusha, and ultimately to western Kenya. Although not yet a town, it was a regional centre with a number of urban features. Arusha was conquered by the Germans in 1896 after the murder of the first two missionaries who attempted to settle on nearby Mount Meru. The Germans established a permanent presence in 1900 when a military fort (a boma) was built and soldiers were garrisoned there.