The artistic richness of the frescoes, carvings, and ancient material monuments found on these sites is enormous. And to top it off, all of this rich cultural history is preserved by a large museum complex, complete with a rich library that preserves approximately 3,500 unique exhibits, including nearly 300 manuscripts, and 9,000 print and graphic publications from the 11th to 19th centuries. Safely protected within the museum grounds are also the relics of the founder of the monastery and patron saint of the Bulgarian people, St. Ivan Rilski, as well as the icon of the Most Holy Mother of God Osenovitsa, and the relics of 32 early Christian saints.