Summary: kinematical properties and dynamical ages of extended halos

In this talk, I will provide a summary of the Sexten CfA``Light in the suburb’’  workshop with the focus on the kinematics of stellar halos. I will start with an historical perspective from Alan Dressler’s 1979 work on the velocity dispersion profile of the cD galaxy NGC 6166. I will then describe how halos make the difference in ICL, BCGs and early-type galaxies. Next I explore the links among different galaxy components and the distribution of orbits in the outer halos. I will address the way in which the different kinematics of independent tracers (PNe, red/blue GCs) can provide information on the progenitors of the halo stars. I will conclude with different examples of dynamical status and ages of stellar halos.