  I present the latest results from our group about the multiple stellar
populations in the old Milky Way globular clusters (GCs) and in the young
systems both in the Magellanic Clouds and in the Milky Way. For the ancient GCs
in our Galaxy I summarize the chemical properties of the stellar populations as
observed on the chromosome map. Both Type I and Type II GCs are discussed. For
the youngest clusters I will briefly report our latest spectroscopic analysis
on the Large Magellanic Cloud cluster NGC1818 and the Galactic open cluster
NGC6705 (M11), which supports the co-existence of stellar populations with
different rotation rates.
