The National Library in Warsaw has just published a book containing two essays written by me: one on the Old Annals of the Holy Cross (12th c.), and the other on the Ciołek’s Missal (early 16th c.). The book has been published both in Polish and in English. English version is available here: https://ksiegarnia.bn.org.pl/466/The-First-the-Oldest-in-the-Collections-of-the-National-Library-of-Poland.html…