Monday President Karolos Papoulias to meet with members of the Union of Greek Olympians. Archbishop Christodoulos visits Thessaloniki to speak at a conference on «Theology-Humanitarian Studies and Positive Sciences,» hosted by Aristotle University of Thessaloniki in cooperation with Athens University. To Tuesday. Constantine Karamanlis Institute of Democracy hosts a conference on «Europe’s Global Challenges: The Limits of Europe and the New Politics of the Center,» at 7 p.m. at the Athens Hilton Hotel. Professor of European Thought at the London School of Economics John Gray will speak. Tel. 210.725.7495. Tuesday President Karolos Papoulias to visit the prefecture of Ioannina in northwestern Greece. 32nd Panhellenic Medical Congress begins at the Athens Concert Hall. To Saturday. Tel 210.721.1845 or log on www.mednet.gr. French Institute to present the Greek edition of a book by former French prime minister Lionel Jospin. «The World As I See It» (Le Monde Comme Je Le Vois) will be launched at 7 p.m. at the institute, 31 Sina. PASOK leader George Papandreou will speak. Tel 210.366.1212. Wednesday Municipal employees begin a 48-hour strike demanding more pay and asking that their jobs to be classified as hazardous. Demonstrations will take place in the morning in front of Athens University on Panepistimiou Street and then move on to the Interior Ministry and Parliament. State hospital employees stage a 24-hour strike demanding salary increases and for their jobs to be classified as hazardous. At 11 a.m. they will demonstrate on Panepistimiou Street in front of Athens University. Hellenic-American Union is hosting a lecture «America’s Media War : The Manipulation of the News Media,» at 8.30 p.m. in the union’s auditorium, 22 Massalias, Kolonaki. Tel 210.368.0071. Thursday Prime Minister Costas Karamanlis visits Vienna to attend the fourth EU-Latin America / Caribbean summit. To Saturday. State Senior High School Teachers Federation (OLME) holds a 24-hour strike over financial and institutional demands. Friday State hospital employees stage a three-hour work stoppage from noon to 3 p.m. over financial and institutional demands. Saturday Athens University’s medical school holds its third annual congress at Zappeion Hall. To tomorrow.Tel 210.725.7693.