On 18 September 2017 the seminar "Public order, national security and the rights of third - country nationals in immigration and citizenship cases" was held in the oldest building of Jagiellonian University (Collegium Maius) . The seminar was organized by Association of the Councils of State and Supreme Administrative Jurisdiction of the European Union (ACA-Europe) and Supreme Administrative Court of Poland in cooperation with the Voivodship Administrative Court in Cracow, represented by the Vice-President of this Court dr Anna Dumas. Over forty participants were present at the seminar, representing the Councils of State and the Supreme Administrative Courts from twenty EU Member States.