Unfortunately, labour law is very seldom on the bookshelves of the workers in Europe. It certainly is on the desks of trade union officials, of HRM staff of the enterprises and of lawyers and judges, but that is French, German, Polish, etc. labour law. European Labour Law is hardly known even among labour law experts. That is of no great matter as much of the labour law of Europe is, like a sponge absorbs the water, implemented in domestic law. Sometimes, however, one needs to trace the European origins of domestic laws, for example when there are doubts whether domestic law is fully in accordance with European law.This book has the ambition to put the reader wise about the European origins on Labour Law. It is the fruit of lectures that Prof. Antoine Jacobs has given (2012-2019) as visiting professor at the State University of Milano.