One of the geographers that mentioned Central Asia as a distinct region of the world for the modern world was in 1843 by the geographer Alexander von Humboldt. The borders of Central Asia are subject to multiple definitions. Historically built political geography and culture are two significant parameters widely used in the scholarly literature about the definitions of Central Asia. Humboldt's definition composed of every country between 5° North and 5° South of the latitude 44.5°. Only Humboldt does mentions some geographic features of this region which include the Caspian Sea in the west the Altai mountains in the north and the Hindu Kush and Pamir mountains in the South. The Prussian geographer did not give an eastern border for the region. Von Humboldt's legacy on Central Asia is still seen in the present, He has a university named after himself which provides the Central Asian Studies (Based on the wider Central Asia definition). The Russian Geographer Nicolay Khanykoff questioned the latitudinal definition of Central Asia. Khanykoff himself preferred a physical definition of the region which is all countries located in this region being landlocked from water. These definitions mostly included the countries: Afghanistan, Tadjikistan, Uzbekistan, Turkmenistan, Kyrgyzstan, Khorasan and East Turkestan (Xinjiang).