Jan Krzysztof Frąckowiak, a Polish diplomat and scientist, has died in Belgium at the age of 83. He was a key negotiator during Poland’s accession to the European Union, working within Jan Kułakowski’s team. Frąckowiak also served as a deputy minister of science throughout his career. The Polish Press Agency reported his death, as confirmed by Ewa Haczyk. His work was instrumental in preparing Poland for membership and navigating the complex negotiations involved. He is remembered for his contributions to Poland’s integration with Europe. Further details regarding his passing have not yet been released.