The paper presents research and didactic achievements of the Institute of Social Policy of Warsaw University, one of the oldest academic centers which educates students in the sphere of social policy and does the research in the field of social policy, understood as a science and a form of public activity. The text introduces into the very idea of the jubilee and presents the activities which the team of the Institute undertook to celebrate its 30-th anniversary. The work presents the origins of the Institute and its creators, characterizes its research achievements in the past 30 years, presents the evolution of didactic programs, forms and partners of scientific and didactic cooperation in Poland and abroad. It also presents persons and institutions important for the development of the Institute and its achievements. Finally the paper includes plans for the future of the Institute as the academic centre influential for the development of the science of social policy.