In the 1860s, new neighborhoods began to develop outside the Old City walls to house pilgrims and relieve the intense overcrowding and poor sanitation inside the city. The Russian Compound and Mishkenot Sha'ananim were founded in 1860, followed by many others that included Mahane Israel (1868), Nahalat Shiv'a (1869), German Colony (1872), Beit David (1873), Mea Shearim (1874), Shimon HaZadiq (1876), Beit Ya'aqov (1877), Abu Tor (1880s), American-Swedish Colony (1882), Yemin Moshe (1891), and Mamilla, Wadi al-Joz around the turn of the century. In 1867 an American Missionary reports an estimated population of Jerusalem of 'above' 15,000, with 4,000 to 5,000 Jews and 6,000 Muslims. Every year there were 5,000 to 6,000 Russian Christian Pilgrims. In 1872 Jerusalem became the center of a special administrative district, independent of the Syria Vilayet and under the direct authority of Istanbul called the Mutasarrifate of Jerusalem.