The article is the most detailed study published in recent years of Yom Tov Lipman Mühlhausen, a hitherto neglected Jewish author active at the turn of the fifteenth century in Bohemia.

The tract On the Householder (O Hospodářovi) written in 1376 by the lay nobleman Thomas of Štítné holds a place of pride in the history of old Czech didactic literature. Pavel Blažek presents his discovery of the Latin source and model of On the householder: the (until 2018) unedited Latin sermons on the Christian household by the Bavarian Franciscan preacher Berthold of Regensburg (d. 1272). Providing a careful analysis of the relationship of On the householder to its newly discovered model, Blažek shows that Thomas of Štítné used Berthold’s sermons very freely creating thus on their basis a text which was very much his own.

Although the phenomenon of mirror images counts among the causes celèbres of medieval natural philosophy, it has surprisingly not received any systematic treatment in modern scholarship so far. In his pioneering study, Lukáš Lička assesses for the first time in detail the two main, and mutually exclusive, medieval explanations of this optical phenomenon. The first was formulated by Albert the Great, the second by Peter Auriol.

The article revises Pierre Hadot's influential hypothesis according to which some Neo-Platonic authors, such as Porphyry, Marius Victorinus, and Deuxippus presupposed a common genus of being or substance encompassing various ontological levels of Platonic universe.

Rheinisches Museum für Philologie 160, 2 (2017)