The Cathedral Basilica of the Assumption of the Blessed Virgin Mary was built in 1899 on the plan of a Latin cross basilica type. As of 25 March 1992 is the cathedral of the Diocese of Sosnowiec.
The most important Catholic shrine of Sosnowiec was built between 1893 and 1899. In 1896 there was put into operation for the faithful the lower chapel. In 1899 the Bishop of Kielce Tomasz Kulinski erected a new parish, freeing it from the area of the parish of Czeladź. In the year 1901 there was put into operation the rectory.
In October 2014 it was affected by a fire.
References:The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.