Frieze:
A broad horizontal band of sculpted or painted decoration, especially on a wall near the ceiling.
‘the horsemen of the Parthenon frieze’
‘the coastline is a frieze of cliffs’ [Oxford Dictionaries]
Noted in “A Princely Update,” Jason Urbanus, Archaeology ( Sept/Oct 2017):
Radiography showed that the prince’s belt was embroidered with fine silver threads that formed a continuous frieze of Celtic motifs, the only one of its kind ever discovered.