  The ACS Virgo cluster survey by Cote' and collaborators shows the presence of
compact nuclei at the photocenters of many early-type galaxies. It is argued
that they are the low-mass counterparts of nuclei hosting Super Massive Black
Holes (SBHs) detected in the bright galaxies. If this view is correct, then one
should think in terms of central massive objects, either SBHs or Compact
Stellar Clusters (CSCs), that accompany the formation of almost all early-type
galaxies. In this observational frame, the hypothesis that galactic nuclei may
be the remains of globular clusters driven inward to the galactic center by
dynamical friction and there merged, finds an exciting possible confirm. In
this short paper we report of our recent results on globular cluster mergers
obtained by mean of detailed N-body simulations.
