In this book, Ondřej Schmidt offers a critical biography of John of Moravia, illegitimate son of the Moravian Margrave John Henry from the Luxembourg dynasty. Earlier research has confused John with another son of the Margrave, but here, the author argues that John actually became provost of Vyšehrad (1368–1380), bishop of Litomyšl (1380–1387), and eventually patriarch of Aquileia (1387–1394). The study provides a detailed account of John’s life and his assassination in the wider context of princely bastards’ careers, the Luxembourg dynasty, and Czech and Italian history. Schmidt also explores the development of the “second life” of John of Moravia in the historical memory of the following centuries.