The Black Prayer Book is a blessing and a curse – research special

Among the millions of objects stored in the Austrian National Library are numerous unique pieces of world fame. It seems difficult to highlight specific objects from this bibliophile cabinet of wonders, but individual specimens still stand out from this potpourri of gems. These undoubtedly include the so-called Black Prayer Book, which is also known as the Book of Hours of Galeazzo Maria Sforza and the Book of Hours of Charles the Bold.