On the occasion of the thirtieth anniversary of the founding exhibition, the Rings of Memory and the CRHIA of Nantes University are offering an international symposium in May 2022: "SLAVERY, from slavery to emancipation, thirty years of historical research" and an artistic program and cultural. Between guided tours of the old port of Nantes, conference on the theme, marathon of images or even round table, the exchange is in order, and is part of the thirtieth year of existence of the association.