What is "gobir"

Gobir ( Demonym: Gobirwa) was a city-state in what is now Nigeria. Founded by the Hausa in the eleventh century, Gobir was one of the seven original kingdoms of Hausaland, and continued under Hausa rule for nearly seven hundred years. Its capital was the city of Alkalawa. In the early 19th century elements of the ruling dynasty fled north to what is today Niger from which a rival dynasty ruling as Sarkin Gobir (Sultan of Gobir) at Tibiri. In 1975 a reunited traditional sultanate took up residence in Sabon Birni, Nigeria