France, June 19 -- The summit follows the adoption in March of a non-binding United Nations resolution, championed by Ghanaian President John Mahama, calling on countries involved in the slave trade to engage in restitution and compensation.

The landmark UN resolution recognised the transatlantic slave trade as the "gravest crime against humanity".

This week's summit concludes with a ceremony at Osu Castle in the Ghanaian capital Accra, a fort built by Denmark and Norway in the 1660s which held enslaved people. The ceremony will mark Juneteenth, an annual public holiday commemorating the end of slavery in the United States. Organisers say it is the first time the celebration has been held outside the US.

"We won the battle against slav...