In april 2010, as part of a scheme to beautify the rundown port near the centre of Rio de Janeiro for the 2016 Olympic games, workers were replacing the drainage system in a shabby square when they found some old cans. The city called in archaeologists, whose excavations unearthed the ruins of Valongo, once Brazil's main landing stage for African slaves. From 1811 to 1843 around 500,000 slaves arrived there, according to Tania Andrade Lima, the head archaeologist. Valongo was a complex, including warehouses where slaves were sold and a cemetery. Hundreds of plastic bags, stored in shipping containers parked on a corner of the site, hold personal objects lost or hidden by the slaves, or taken from them.
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