Karakalpakstan, officially the Republic of Karakalpakstan, is an autonomous republic of Uzbekistan. It spans the northwestern portion of Uzbekistan. Its capital is Nukus. Karakalpakstan has an area of 166,590 km2 (64,320 sq mi), and has a population of about 2 million people. Its territory covers the classical land of Khwarazm, which in classical Persian literature was known as Kāt (کات).