Monday President Karolos Papoulias to meet with the visiting Croatian Prime Minister Ivo Sanader at 11.30 a.m. The 10th Symi Symposium takes place on the island of Paros. The symposium is organized by the Andreas G. Papandreou Foundation and the PASOK party. This year’s symposium focuses on the environment, climate change and alternative energy sources. To Friday. PASOK leader George Papandreou will speak. Tel. 210.366.5414 or log on to www.pasok.gr. Athens Institute for Education and Research holds an international conference on «Law» at the University of Athens. To tomorrow. Tel. 210.363.4210 or log on to www.atiner.gr. Andreas Papandreou Institute of Strategic Development Studies (ISTAME) to present the report on human rights violations during the New Democracy administration, at 2 p.m. at the Foreign Press Association. Deputy Labor Minister Gerasimos Giakoumatos visits the prefecture of Kozani. Summer sales begin and will last through August 31. Tuesday Synaspismos Left Coalition President Alekos Alavanos visits the island of Icaria. To tomorrow. Friday German Chancellor Angela Merkel visits Athens. She will meet with Prime Minister Costas Karamanlis for talks about the European Union and bilateral issues. She will also meet with President Karolos Papoulias. PASOK leader George Papandreou visits the island of Yiaros. Saturday Guards at the Acropolis begin a four-day strike, demanding permanent contracts and better pay. Visitors will not have access to the monument as a result of the industrial action.