Objet d'art is a French term, literally meaning "object of art", used to describe any odd or curious piece that doesn't fit into the regular categories of artwork like paintings, drawings, sculptures, etc.
Usage
See Special:Whatlinkshere/Etymology:Objet d'art for a list of articles using this term.
This is an etymology page: a page detailing the origins of terminology used in the series in regards to real world culture and history.