Rodez (Aveyron) - Musée Fenaille
This figure, described as a Gallo-Roman "Dancing Venus", wears
clothes resembling those of a Roman matron
and holds her long tresses in the manner of many sheela-na-gigs and
Romanesque exhibitionists.
To her left is a serpentine monster.
On one of the narrow sides of the stele or slab is an almost-effaced standing
male figure.
Such a carving is a very likely source of inspiration for Romanesque sculptors.
For a book-length discussion on the survival of Roman antiquities see Michael Greenhalgh's
"THE SURVIVAL OF ROMAN ANTIQUITIES IN THE MIDDLE AGES",
especially
Chapter 10, which you can download
here.