Abuja is the capital city of the Federal Republic of Nigeria, strategically situated at the geographic midpoint of the country within the Federal Capital Territory (FCT). As the seat of the Federal Government of Nigeria, it hosts key national institutions, landmarks, and buildings spread across its over 50 districts. It replaced Lagos (the most populous city in Nigeria) as the capital on 12 December 1991.
Abuja's geography is defined by Aso Rock, a 400-metre monolith left by water erosion. The Presidential Complex, National Assembly, Supreme Court, and much of the city extend to the south of the rock.