Columbia subject headings:
Harvard subject headings:
Bulgaria--Antiquities--Pictorial works.
Bulgaria--Antiquities.
Excavations (Archaeology)--Bulgaria
Excavations (Archaeology)--Bulgaria--Pictorial works.
Mosaics, Ancient--Bulgaria--Pictorial works.
Mosaics, Ancient--Bulgaria.
Mosaics, Early Christian--Bulgaria--Pictorial works.
Mosaics, Early Christian--Bulgaria.
Mosaics, Roman--Bulgaria--Pictorial works.
Mosaics, Roman--Bulgaria.
Princeton subject headings:
Mosaics, Ancient--Bulgaria.