redniowiecznych

Redniowiecznych is not a standard Polish adjective form. In normative Polish, the correct term is średniowiecznych, the genitive plural of średniowieczny, meaning medieval. The form redniowiecznych is generally regarded as a misspelling or nonstandard variant, likely arising from confusion with the proper root średniowieczny. Editors and grammars typically correct such uses to średniowiecznych when describing plural nouns.

The standard usage describes things related to the Middle Ages. Średniowieczny (and its inflected forms like średniowiecznych) is used to refer to the period commonly titled the Middle Ages in European history, roughly from the fall of the Western Roman Empire to the onset of the Renaissance and early modern era, with regional dates varying. In Polish, this terminology appears in contexts such as architecture, literature, culture, and historical analysis: for example, architektura średniowieczna (medieval architecture) or kroniki średniowiecznych królów (chronicles of medieval kings).

In practice, one should replace any occurrence of redniowiecznych with średniowiecznych to ensure clarity and conformity with standard Polish. The term is widely used in both academic and popular writing to denote the medieval period and its associated cultural and historical features. See also Średniowiecze and średniowieczny for related concepts and proper grammatical forms.