This is a rare and unique illuminated manuscript from the Middle Ages. It is a hand-written document that has been decorated with intricate and colorful illustrations, often featuring religious motifs. The manuscript is made from high-quality vellum or parchment and is illuminated with gold and silver inks
From Wikipedia
An illuminated manuscript is a formally prepared document where the text is decorated with flourishes such as borders and miniature illustrations. Often used in the Roman Catholic Church for prayers and liturgical books such as psalters and courtly literature, the practice continued into secular texts from the 13th century onward and typically include proclamations, enrolled bills, laws, charters, inventories, and deeds.