 These buildings have remained to this day but only one still belongs to Solvay (and houses the Solvay Conference).Leopold Park contains a number of historic buildings such as the Pasteur Institute, the former Solvay School of Commerce, Solvay Institute of Sociology, and Solvay Institute of Physiology, as well as the former Solvay Library, which houses the Security & Defence Agenda, Friends of Europe and Maisons de l'Europe think tanks.Most of the buildings were converted into offices for the European institutions in the 1980s.