Diocese of Plock shared in the sufferings of the Catholic Church of Russia.
Apollinaris Wnukowski (1904-08) were elevated to the Archdiocese of Mohileff; the present bishop is Anthony Julian Nowowiejski, consecrated 6 December, 1908.
Plock was rebuilt after a fire in the years 1136-44, and thoroughly restored in 1903.
Plock is situated in the northwestern outskirts of Masovian Voivodeship, on the borders of two macroregions: Plock Valley and Dobrzynskie Lakeland.
Plock obtained municipal rights in 1237 but it existed before this as a fortified burg – even as early as 10th century.
In the beginning it was a seat of Masovianbishops, and during the years 1079-1138 (under the reign of Ladislaus Herman and his son Boleslaus III the Wrymouth) Plock became a capital city of Poland.