• Cooperation Agreement between Sofia University “St. Kliment Ohridski”, the University of Lille and the University of Quebec at Rimouski – signature: 03-04/2017.
  • Specific Agreement for Zaldapa, between Sofia University “St. Kliment Ohridski”, Dobrich Regional Historical Museum, the University of Lille and the University of Quebec at Rimouski – signature: 11/2017-01/2018.
  • Cooperation agreement between the Leibniz-Institut für Geschichte und Kultur des östlichen Europa (GWZO), the University of Lille and the HALMA-UMR 8164 research centre – signature : 27/11/2018-29/10/2019.
  • Cooperation agreement between the Institute of Archaeology in Belgrade, the University of Lille and the HALMA-UMR 8164 research centre – signature : 13/06/2019-18/11/2019.