L'OEIL DE BOEUF
Oeil-de-boeuf, also œil de bœuf, (French, "bull's eye") is a term applied to a relatively small oval window, typically for an upper storey, and sometimes set on a roof slope as a dormer, or above a door to give light. Windows of this type are commonly found in the grand architecture of Baroque France. The term is also so often applied to similar round windows that this must be considered part of the usage. It is sometimes anglicized as an "ox-eye window". The term initially applied to horizontal oval windows, but is also used for vertical ones.-wikepedia-
I love those pretty round or oval windows called Oeil de boeuf that you find on Paris roofs and most everywhere in France on old houses. They come with all kinds of decorative details carved in stone or cast in zinc or copper. Some are as simple as just a hole cut into a stone wall, some are extremely ornate complete with curlicues, garlands and flower motifs, always very elegant like a very decorated dot on an "I". Antique metal ones, especially zinc oeils de boeuf have come up in antique stores or brocantes- flea markets- everywhere in France; Some stores have made antique and reproductions into very spectacular mirrors which really "make a room".
Authentic Oeils de boeuf decorate roofs and walls of many old houses in France
and fabulous looking wood ones from the Restoration hardware catalogue
images restoration hardware, mise en demeure, google images