  Recent progress of lattice investigations in thermal physics is summarized in
this contribution. Hadronic spectral functions can be reconstructed from
correlation functions in Euclidean time based on the Maximum Entropy Method
without a priori assumptions on the spectral shape. The thermal modifications
of hadron properties are investigated in the scalar, pseudo-scalar, vector and
axial-vector channels near and above the deconfinement transition temperature
for charmonium systems as well as for light quarks. Moreover, the reconstructed
vector meson spectral function allows to extract the thermal cross section for
the production of dilepton pairs at vanishing momentum.
