Abstract : In this book, different Belgian legal historians treat various aspects of legislation in the Netherlands and Liège from the Late Middle Ages to the end of the 18th century: the ordinances of the Burgundian dukes (J.M. Cauchies), the edition of the ordinances of Philip II (G. Janssens), the registration of births, marriages and deaths (C. de Moreau de Gerbehaye), legislation on the notary public's office (M. Oosterbosch), legislation on woods in Luxembourg (J.M. yante), legislation on health care (C. Bruneel), the interaction of legislation and science (A. Wijffels), the more pragmatic than scientific value of legislative texts (G. Martyn)