Meetings 23 Learned institutions and societies 18 Seminars 14 Congresses and conventions 12 History 10 Universities 9 Directories 8 Museums 8 Nobel prizes 7 Biography 6 Management 6 Societies 6 Workshops (Adult education) 6 Academies and institutes 5 Economic aspects 5 Nobel Prize winners 5 Academies and Institutes 4 Decorations of honor 4 Handbooks, manual, etc 4 Insignia 4 Medals 4 Planning 4 Workshops (Seminars) 4 Awards 3 Convention facilities 3 Humanities 3 Unesco 3 Alfred Bernhard 2 Art 2 Culture 2