Kulob (Tajik: Кӯлоб / Persian: کولاب‎, meaning lake water, the prior an Uzbek word and latter Tajik), also Kulab or Kulyab (Russian: Куляб), is a city in Kulob district, Khatlon Province, Tajikistan. Located 203 km south-east of the capital Dushanbe on the Yakhsu River (a right tributary of Panj), it is one of the largest cities in the country and has an estimated population of 100,000. Kulob is known for being ancient, and in his histories historian Muhammad ibn Jarir al-Tabari refers to the city as early as 737AD, although its founding is said to have been much earlier. Throughout its history, Kulob was known by the name Khatlān or Khatlon in modern Tajik, with its modern name only about 250 years old. The most famous and important landmark and tourist attraction in Kulob is the mausoleum of the famous Islamic poet and scholar Mir Sayyid Ali Hamadani, which is featured on the Tajik 10 somoni bill.