  We review lattice calculations of the elementary Greens functions of QCD with
a special emphasis on the Landau gauge. These lattice results have been of
interest to continuum approaches to QCD over the past 20 years. They are used
as reference for Dyson-Schwinger- and functional renormalization group equation
calculations as well as for hadronic bound-state equations. The lattice
provides low-energy data for propagators and three-point vertices in Landau
gauge at zero and finite temperature even including dynamical fermions. We
summarize Michael M\"uller-Preu{\ss}ker's important contributions to this field
and put them into the perspective of his other research interests.
