THURSDAY President Karolos Papoulias visits the National University of Athens at noon to attend a ceremony marking the 170-year anniversary of its foundation. Education Minister Marietta Giannakou visits Istanbul to attend the 22nd conference of the Council of Europe’s education ministers. To Saturday. Deputy Foreign Minister Yiannis Valinakis to meet with his Spanish counterpart Bernardino Leon who is on a visit to Athens. Deputy Foreign Minister Evripidis Stylianidis visits Egypt to attend the launch of the UN’s International Compact with Iraq. Foreign Ministry in cooperation with the Greek Association of Industries and Processors of Olive Oil (SEVITEL) holds a conference on «Promoting Greek Olive Oil in International Markets,» at 11 a.m. at the Foreign Ministry. General Secretary for International Financial Relations and Development Cooperation Theodore Skylakakis will speak. Tel. 210.323.8856. The 30th annual spring book fair opens on the Dionysiou Areopagitou pedestrian walkway and will last through May 14. Culture Minister Giorgos Voulgarakis will make the official opening. FRIDAY National Center for Public Administration and Local Government holds a conference on «E-Governance,» at 9 a.m. at the Athens Imperial Hotel. Interior Minister Prokopis Pavlopoulos to make the opening address. Tel. 210.349.6400 or log on to www.ekdd.gr. Hellenic Association of Pharmaceutical Companies (SFEE) holds a conference on «Direct Access to Medicines – Quality and Computerization in Health Sector,» at 10 a.m. at Zappeion’s Aigli. Health Minister Dimitris Avramopoulos to speak. Tel. 210.689.1101 or log on to www.sfee.gr. The American College of Greece hosts a conference on «Eleftherios Venizelos: Unknown Aspects of the Man,» at 10 a.m. at its premises. Tel. 210.600.9800. SATURDAY Education Minister Marietta Giannakou visits Berlin to attend the European meeting on 2007-2013 lifelong learning programs. The first Sports Cars Show opens at 11 a.m. at the Anatolia College of Thessaloniki. To tomorrow. Tel. 2310.753.123.