Did you make it to the eighth episode of “The Young Pope,” the one which sees our saintly Jude Law bring his pontifical dog-and-pony show to a country called Africa? Astounding, in 2017, that you can still get away with this: the anonymous land ruled by a military dictator, where children are starving, dust rises in the heat and there isn’t a skyscraper or cellphone in sight. (“The Young Pope” was actually shot outside Cape Town, which has no shortage of both.) You would not know, from most Western media, that Africans live in a whole range of places, bucolic or bustling — and that Africa is urbanizing faster than anywhere on earth.

Foire Internationale de Dakar, a convention center in Senegal, by Jean François Lamoureux and Jean-Louis Marin, from 1974.
Foire Internationale de Dakar, a convention center in Senegal, by Jean François Lamoureux and Jean-Louis Marin, from 1974. © Iwan Baan

The United Nations projects that, by midcentury, more than half of Africans will live in cities. A string of them — Lagos, Nigeria; Kinshasa, Congo; Cairo — are already more populous than New York. Yet African cities remain poorly understood in the West, which gives a particular urgency to “Architecture of Independence — African Modernism,” a captivating study of the development of modernist building in five African countries: Ivory Coast, Ghana and Senegal in the continent’s west, Kenya in the east and Zambia in the south.

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The nations studied here won independence between 1957 and 1964, and a massive timeline maps their economic gyrations, stumbles toward democracy, and soccer successes from liberation to the present. With independence came construction, from private and public sectors alike. In these countries’ capitals, International Style architecture became a marker of new nationalist ambition, whether in Abidjan, the economic engine of Ivory Coast, which built high rises resembling those of La Défense in Paris, or in Lusaka, where a new building for Zambia’s National Assembly comprised a long concrete block supported by dainty pilotis. (The show’s curator, Manuel Herz, focuses on independent countries and thus excludes cities that experienced significant modernist building under colonial rule — notably Asmara, Eritrea, a preserve of architecture of Fascist-era Italy, and Maputo, Mozambique, where Portuguese architects tried out a subtropical Brutalism.)

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Inscribing these projects into the history of global architecture and urbanism is an urgent project, one both “Architecture of Independence” and its associated book undertake with aplomb. If it inspires further exhibitions on African architecture — a Maputo show would be a revelation — it should also, through Mr. Baan’s photography, remind us that these fast-growing cities can’t fully be understood through masterpieces alone. After all, the story of modern African cities is as much the story of informal architecture and urbanism, springing up around historic centers. The townships of Johannesburg; the musseques of Luanda, Angola; the shantytowns of Dar es Salaam, Tanzania: The real action in African cities — many of them growing faster than ever — may be in the unplanned suburbs, still waiting for their close-up.