A modello, (plural modelli) from the Italian, is a preparatory study or model, usually at a smaller scale, for a work of art or architecture, especially one produced for the approval of the commissioning patron. The term gained currency in art circles in Tuscany in the fourteenth century. Modern definitions in reference works vary somewhat. Alternative and overlapping terms are "oil sketch" (schizzo) and "cartoon" for paintings or stained glass, maquette, plastico or bozzetto for sculpture or architecture, or architectural model.