Dobrodzień [dɔˈbrɔd͡ʑɛɲ] (German: Guttentag, Silesian: Dobrodziyń[2]) is a small town in Olesno County, in Opole Voivodeship, Poland.

The area is documented as part of the Upper Silesian Duchy of Opole of the fragmented Kingdom of Poland, since about 1163 under the rule of Duke Bolesław I the Tall.

[3] It remained under the rule of the local Polish dukes of the Piast dynasty, although as a fief of the Bohemian Crown from 1327, until the dissolution of the Duchy of Opole and Racibórz in 1532,[4] when it was incorporated into the Habsburg-ruled Kingdom of Bohemia, as part of which it was owned by the Posadowski, Jarocki, Blacha and Blankowski noble families.

[6] After World War I, in the Upper Silesia plebiscite held in March 1921, 79.5% of the citizens of the town came out in favour of a continuance in Germany, and while most parts of the Lubliniec district were reintegrated with the re-established Polish Republic, Dobrodzień, as Guttentag, remained on the German side, within the Prussian Province of Upper Silesia and ended up very close to the new German–Polish border.

[9] After the invasion of Poland, which started World War II, the assets of the Polish bank were confiscated by the German state.

Up till then the town had a mostly Protestant population,[citation needed] but after the expulsion of most of the German inhabitants, it was resettled with mainly Catholic Poles, many of whom were expelled from former eastern Poland annexed by the Soviet Union, in particular from Barszczowice.