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The Kano city wall n West Africa in what will become northern Nigeria is completed after 40 years construction, begun in 1095. Built by King Kijimazuto repel invaders, the 3.5 metre high and 1.4 metre thick elaborately decorated mud wall features regularly-spaced gates equipped with guard towers. In 1903, the wall is declared “the most impressive landmark in West Africa” by the Governor-General of British Nigeria, who urged its preservation. However, the growing population of Kano eventually destroyed all but fragments of the wall by the 21st century.
