  We calculate Fermi-surface properties of the Cuprate superconductors within
the three-band Hubbard model using a cluster expansion for the proper
self-energy. The Fermi-surface topology is in agreement with angular-resolved
photoemission data for dopings $\sim 20\%$. We discuss possible violations of
the Luttinger sum-rule for smaller dopings and the role of van-Hove
singularities in the density of states of the Zhang-Rice singlets. We calculate
the shift in the chemical potential upon doping and find quantitative agreement
with recent experiments.
