Zmiany uczestnictwa w niedzielnych praktykach religijnych w diecezjach w Polsce w latach 2004–2018

The article describes the dynamics of religious practices on Sundays of Catholics in dioceses in Poland in the years 2004–2018. It aims to present the regional differentiation of the dioceses of the Catholic Church in Poland on the basis of changes in the values of dominicantes and communicantes, and to indicate areas in Poland with similar changes in participation in religious practices on Sundays. A typology of the dioceses was done on the basis of changes in the values of the dominicantes and communicantes indicators from 2004 to 2018, using data from the Institute for Catholic Church Statistics. The results indicate the geographical and historical determinants of the changes – participation in religious practices increased in the dioceses located in the area of the former Congress Kingdom (mostly in its eastern part) and Galicia, and decreased primarily in the dioceses located in the Recovered Territories and Greater Poland.