Poland and Lithuania in 2009-2013. A good or difficult neighbourhood?

The main research problem is the analysis of the Polish policy with regard to Lithuania in 2009-2013. Some factors which influenced the crisis in mutual relations are presented. The initial dividing line is connected with worsening the mutual relations in 2009. The sources are based on the Minister of Foreign Affairs speeches, reports, press materials and professional books and articles. The author analyses the source materials. The problems of the Polish minority in Lithuania had a major impact on the relationship between the two countries. The difficulties in solving the problems were connected to their different perception by the Polish and Lithuanian sides. Despite the difficulties in fixing those matters, the cooperation in other fields, like economy or military, was continued