Post-war Lower Silesia was intended by the communists to be a "laboratory of socialism". Hence, they developed and pursued a special policy towards the Catholic Church. The book highlights the specificity of the pastoral ministry provided by the successive rulers of the Church in Wrocław (Karol Milik, Kazimierz Lagosz, Cardinal Bolesław Kominek) in the realities of the communist state. It shows the role of Cardinal Kominek who was persecuted for his attitude towards communists, his activity in the Polish Episcopate and in the forum of the universal Church. Moreover, it presents the system of repression aimed at diocesan clergy and religious orders and limiting theological education. With the objective of secularising the Lower Silesian society, the communists put emphasis on promoting their ideology, especially among the young generation. The Church responded with speeches by hierarchs condemning these activities and with pastoral initiatives to slow down the process.