Fourteen test zones were studied in the Phase II program of light water high conversion reactor physics experiments at the PROTEUS zero-power facility in Wurenlingen. The test lattice configurations investigated, the types of integral measurements carried out, experimental techniques applied, and accuracies achieved are reviewed in the first part of this paper. Parallel to the experimental program, a continuous improvement of the calculational methods and nuclear data used for the prediction of lattice parameters took place. A short description is given of the specially developed computer codes and nuclear data bases. Finally, various experimental results are compared with calculated values. For several types of parameters, the agreement between experiment and calculation is now within the experimental error limits. In certain cases, however, such agreement is found to be the result of compensating discrepancies