On 18 May 2022, we celebrate the 30th anniversary of the signing of the Treaty on Good Neighbourliness, Friendly Relations and Cooperation between Poland and Ukraine. It gave impetus to an intensive dialogue and cooperation in the fields of politics, commerce, defence, culture, sports etc. Institutional forms of cooperation between Polish and Ukrainian state were established. For the past 30 years, Poland has remained one of the most devoted supporters of Ukraine’s European and Euro-Atlantic aspirations. The Treaty also intensified strengthening ties between societies, creating a huge potential for genuine friendships between ordinary people and the Polish and the Ukrainian nations. Its effects are particularly evident today, when Poles eagerly rushed to help when their neighbours were attacked by the Russian aggressor. Feel invited to see the exhibition on the last three decades of cooperation between Poland and Ukraine.