The 2021 edition of the Coordination Chemistry Days will be held in person on the Pierre and Marie Curie Campus in the heart of Paris on September 23 and 24, 2021. These two days will be the occasion to gather again the French coordination chemistry community around a scientific program which will be articulated around several invited conferences, including those of the winners of the 2020 Coordination Chemistry Division prizes, 15 min oral communications and a poster session. They are…