This year marks the 600th anniversary of the Primate of Gniezno's archbishops. I am convinced that the celebrations of the 600th anniversary of Primacy in Poland will not only be an excellent opportunity to remind our society of this heritage, but also to feel more strongly than usual the unifying power of Christianity for our community - wrote the Speaker of the Sejm Marek Kuchciński in a letter to the Primate of Poland Wojciech Polak.