Academy of Arts and Sciences (four large volumes were produced between 1915 and 1952), was being continued by the Polish Historical Institute in Rome, under the direction of Karolina Lanckorońska (20 volumes appeared). The PAU joined the project and now it is its only manager and executor, but the enterprise is still financed by the Lanckoroński Foundation (three volumes have appeared). In keeping with tradition, the Class also publishes several series of source materials for Polish history: two volumes of Monumenta Poloniae Vaticana. A new series has been added: Monumenta Sacra Polonorum (two volumes have already appeared). The Class has organized three scholarly symposia: one devoted to the Senate of the Republic of Poland, its historical role and its present status; the second, to the anniversary of the Soviet attack on Poland on 17 September 1939; and the third, to research on the settlement of the first agricultural peoples on both sides of the Western Carpathians in the fifth millennium BC. The Class's most significant publications include a book by Gerard Labuda, Mieszko I król Polski 1025–1034 [Mieszko I, King of Poland, 1025–1034]; a book by Piotr Hübner, Siła przeciw rozumowi. Losy Polskiej Akademii Umiejętności 1939–1989 [Force against Reason: the Fate of the Polish Academy of Arts and Sciences, 1939–1989]; Protokoły posiedzeń Władz RP na Uchodźstwie 1939–1945 [Minutes of the Meetings of the Authorities of the Republic of Poland in Exile, 1939–1945], Volumes I-IV; and Chrześcijaństwo Rusi Kijowskiej, Białorusi, Ukrainy i Rosji (X-XVII wiek) [Christianization of Kievan Ruthenia, Belarus, Ukraine, and Russia (10th–17th century)], edited by Jerzy Kłoczowski; Józef Gierowski The Polish-Lithuanian Commonwealth in the 18th century. The Class cooperates with the Jagiellonian University in publishing the periodical Kwartalnik Filozoficzny [Philosophical Quarterly]. The section is also actively engaged in realizing the agreement with the Slovak Academy of Sciences, through such joint projects as coordinating archaeological research performed by the Kraków centre on both sides of the western Carpathians; studies on Polish-Slovak relations during World War II; and the preparation of a dictionary of the Oravian local dialect. Contracts are in preparation with the Slovenian Academy of Sciences, the Institute of Ukrainian Studies at the National Academy of Sciences of Ukraine in Lviv, and the Czech Academy of Sciences. Commission on Central Europe This Commission was founded in 1991 on the initiative of , to assemble scholars interested in the archaeology, history, philology, and culture of the nations inhabiting Central and