Columbia subject headings:
Mural painting and decoration, Ancient--Bulgaria.
Mural painting and decoration, Bulgarian.
Mural painting and decoration, Early Christian--Bulgaria.
Harvard subject headings:
Mural painting and decoration, Ancient--Bulgaria.
Mural painting and decoration, Bulgarian.
Mural painting and decoration, Early Christian--Bulgaria.
Princeton subject headings:
Mural painting and decoration, Ancient--Bulgaria.
Mural painting and decoration, Bulgarian.
Mural painting and decoration, Early Christian--Bulgaria.