Timbuktu
The old caravan city on the southern edge of the Sahara was, in the 15th and 16th centuries, an intellectual metropolis of Africa — seat of Sankoré University with 25,000 students and a library of thousands of manuscripts. Three great adobe mosques, sixteen saints' mausoleums.
When Islamist militias occupied the city in 2012, they destroyed fourteen of the sixteen mausoleums with picks and chisels. Courageous citizens smuggled hundreds of thousands of manuscripts to Bamako in donkey carts. Today Timbuktu is once again under state control, but the threat from armed groups persists — and the sand of the desert advances further.