The city was drawn around a rock.
Aso Rock is a 400-metre granite monolith that erosion left standing in the middle of open ground. When the plan for Nigeria's new capital was delivered in 1979, the city was not placed beside it: it was drawn from it, in concentric phases outwards. The rock is not a monument in the city; it is its point of origin.
01 Four hundred metres of granite
These formations have their own name in geomorphology: they are inselbergs, 'island mountains', residual reliefs standing out of a plain because they are made of material more resistant than what surrounded them. The Abuja area is scattered with them, and Aso Rock is the largest inside the city.
The most spectacular one nearby, however, is outside: Zuma Rock, 725 metres, beside the expressway heading north towards Kaduna. Almost twice the height of Aso Rock, and visible from many kilometres away. Between them they frame the landscape in which the capital was placed.
02 1976, 1979, 1991
Three dates order the city's history. In 1976, a decree set in motion the development of a new capital to replace Lagos. In 1977 the master plan was commissioned from International Planning Associates, a consortium led by the practice Wallace, Roberts, McHarg & Todd, which delivered it in February 1979.
Work began that same year, 1979, although development stretched into the late eighties. And on 12 December 1991 Abuja officially became the country's capital. That is: fifteen years between the decision and the move, with an entire city built in that span.
One more name is worth mentioning: the Japanese architect Kenzo Tange, who refined the design of the central districts. The plan was therefore not the work of a single hand but an international commission in several layers, which shows in the scale of the avenues and in the separation between the pieces.
03 A plan in five phases
The master plan's structure is concentric and staged. Development was organised in five phases unfolding from Aso Rock outwards, taking in more than fifty districts. Each phase is a ring, and the order of construction follows the order of the rings.
That model has an obvious virtue on paper: it allows growth without remaking what came before, because each ring is added to the edge of the existing one. And it has an implicit condition: that real growth proceeds at the anticipated pace. Abuja is one of the places where that condition was tested most harshly.
In figures, the 2006 census gave 776,298 inhabitants. Between 2000 and 2010, according to United Nations data, the city grew by 139.7 %, making it the fastest-growing city in the world that decade. No 1979 plan was sized for that.
04 How it is covered
The first thing to accept is the scale. Abuja is not a city for wandering: the avenues are very wide, the districts are separated and the distances between pieces are measured in kilometres. It is covered by vehicle, with stops on foot inside each zone.
The useful way to read it is to follow the plan's logic. Start near the rock, where the central axis and the most monumental spaces are, and work outwards through the later rings. On that route you see how the architecture changes and, above all, how the relationship changes between what was planned and what arrived afterwards.
And it is worth leaving the urban perimeter at least once. The landscape of the Federal Capital Territory is scattered with inselbergs, and the northern road passes at the foot of Zuma Rock. Seeing those masses from outside explains the site better than any tour of the centre.
On the calendar: the dry season runs from November to March, with 9.7, 1.3, 0.8, 5.9 and 22.4 millimetres of rain. The wet season runs from May to October and is intense: August alone adds up to 308.3 millimetres over 17.3 days. The difference between visiting in one block or the other is enormous.
