Art historian Hravard Hakobyan notes that "Artsakh carpets occupy a special place in the history of Armenian carpet-making." Common themes and patterns found on Armenian carpets were the depiction of dragons and eagles. They were diverse in style, rich in color and ornamental motifs, and were even separated in categories depending on what sort of animals were depicted on them, such as artsvagorgs (eagle-carpets), vishapagorgs (dragon-carpets) and otsagorgs (serpent-carpets). The rug mentioned in the Kaptavan inscriptions is composed of three arches, "covered with vegatative ornaments", and bears an artistic resemblance to the illuminated manuscripts produced in Artsakh.