This eBook is the English translation of the volume Venticinque lezioni di filologia mediolatina (SISMEL - Edizioni del Galluzzo, 2016). With its critical case-studies, Paolo Chiesa’s book offers an excellent training ground for young people approaching medieval Latin studies, as well as several cues for specialists to reflect on the role played by textual criticism in literary culture, in relation to its duties, tools and potential developments. Born out of the author’s own teaching and research work, the volume testifies to the vigour of textual criticism within medieval Latin studies, underlining its indispensable role as a method of inquiry and as a tool for the acquisition of knowledge.