  A variety of observational approaches have provided evidence for extended
halos of dark matter surrounding elliptical galaxies, and for massive dark
objects in (some of) their nuclei. What are the properties of the dark halos?
How do they relate to the parameters of the luminous matter? What is the
demographics of massive central black holes, and what is their dynamical role
in shaping the host galaxy? Recent work in this area is described, with special
attention to the construction of state-of-the-art dynamical models that
incorporate all available observational constraints.
