Arochukwu, sometimes referred to as Arochuku, or Aro-Okigbo, (pronounced Aruchukwu) is the third largest city in Abia State (after Aba and Umuahia) in southeastern Nigeria and homeland of the Igbo subgroup, Aro people. It is composed of 19 villages with an overall leader called Eze Aro. Arochukwu is a principal historic town in Igboland. It was also one of the cities in the Southern protectorate targeted by the British colonial government. Several historic tourist sites exist in the city. The mystic Ibini Ukpabi shrine, the slave routes and other relics of the slave trade era are frequently visited by tourists.