After the Second World War, the parish of the Assumption of the Blessed Virgin Mary in Bolesławiec included the town of Bolesławiec and the following localities: Bolesławice, Bożejowice, Chościszowice, Dobra, Godnów, Kruszyn, Kruszynek, Łąka, Otok and Rakowicc. In Bolesławice, worshippers used the filial church of St James the Elder, which currently bears the invocation of Our Lady of the Rosary.
In the town, pastoral services were provided at the house of the Elisabeth Sisters at 4 Kubika Street and at the house of the Adorers at 23 Świerczewskiego Street. There was also a religious house of the Adorers in Łaziska. A chapel was also arranged at the County Hospital in Bolesławiec, where the Blessed Sacrament was kept and Mass was celebrated. Unfortunately, in the Psychiatric Hospital in Bolesławiec, the ecclesiastical authorities were unable to recover the freestanding chapel. It was converted into a carpentry workshop.
Initially, the parish of Brzeźnik was served from Bolesławiec; it included the localities of Mierzwin and Zapłocie.
In 1946, Rev. Andrzej Gromadzki established chapels in Łąka, in a small house that had formerly housed a craftsman's workshop; in Dobra, in a private home; and in Łaziska, in a former restaurant. He also established a chapel in Mierzwin, in an old abandoned smithy. In later years, this chapel was modernised by Rev. Władysław Karwacki, the administrator of Brzeźnik. The chapel in Dobra was closed at the end of the 1970s. Over the years, all these places of worship greatly assisted pastoral work, and the initiative and efforts of Rev. Andrzej Gromadzki achieved their intended goal.