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A number of photometric and spectroscopic observational studies have provided strong evidence of the presence of multiple stellar populations in globular clusters and challenged the standard picture of globular clusters as simple stellar populations systems.I will present the results of our studies exploring the formation and dynamical evolution of multiple-population clusters,the implications for the evolution of the clusters stellar content,and the connection between formation and evolution of multiple-population clusters and their contribution to the assembly of the Galactic halo.