the archaeology and natural environment of the Low Beskids mountains (volume II). Cooperation was also initiated and contracts were signed with the Royal Flemish Academy for Science and the Arts in Belgium, with the Academy of Sciences of the Czech Republic, with the Slovenian Academy of Sciences, with the Hungarian Academy of Sciences, with the Romanian Academy of Sciences, and with the Ukrainian National Academy of Sciences. Somewhat looser forms of cooperation exist between the PAU and the Saxon Academy and Sciences, as well as the Austrian Academy of Sciences and with the Brandenburg Academy of Sciences in Berlin. Class II of the PAU has signed a cooperation agreement with the Institute of History in Vilnius. The PAU has also been engaged in scientific cooperation based on treaties negotiated by the Polish Ministry of Foreign Affairs with several countries, including France, Italy, the Czech Republic, Macedonia, and Egypt. Together with the universities in Rome (La Sapienza and LUMSA), in Lecce, in Angers, in Szeged, in Lublin (KUL), and in Tallinn, the PAU constitutes in accordance with the European Union requirements a scientific society named Centro Interuniversitario Internazionale per il Mediterraneo, l'Europa Centro-Orientale e l'Eurasia. In 1994 the PAU Scientific Station in New York was founded, based on the Polish Institute of Arts and Sciences in America, which continued the PAU's traditions during the WWII and of the period of the compulsory suspension of the PAU activities, from 1952 until 1989. Its short-term activities could not be continued due to the lack of financial support. Currently, efforts have been made in order to revive this institution. Contacts have been established with the Polish Institute of Arts and Sciences in Canada, founded in 1943 as a branch of the Polish Institute in New York, and since 1976 operating as an independent Canadian organization. It also acquired a status of the PAU Scientific Station. Three books have been jointly published, and the PAU supports the station with their lecturers. The PAU joined the project of the Polish Historical Institute in Rome, financed by the Lanckoronski Foundation. Recently, after the death of Karolina Lanckoronska, the institute was dissolved and its property, namely numerous publications and scientific projects, such as the publications of the acts of the Apostolic Nunciate in Poland, were taken over by the PAU. Harking back to an older tradition, the PAU is also co-organizing archaeological investigations in Ukraine, continuing the excavation