The QCD plasma state observed at the CERN SPS ============================================= R. Stock Frankfurt University Abstract: --------- Using the CERN Lead beam facility at the SPS we have obtained first insight into the existence, and the properties of the parton-hadron phase transformation predicted by lattice QCD. The data prefer the lower range of recent predictions as far as the critical energy density is concerned (1 GeV per cubic fermi). The order of the phase transformation has also come within reach of the experiments. ----------------------------------------------------------------------- P.S. The developing program for the Tuesday seminar you can find at: http://www-h1.desy.de/~niebuhr/sem_schedule.html