Focus on Contarini Madonna and analyze the Description.
The painting shows the Madonna holding Jesus who stands on a parapet in the foreground. Below is a cartouche with the artist's signature,  IOANNES BELLINVS. The blessing Child has similar features to that in the San Giobbe Altarpiece, dating to the same decade or a few years later. His icon-like staring appearance recalls the Byzantine painting, which was one of the roots of the Venetian painting school. 
The background is formed by a soft landscape, with hills and a city with towers.
Byzantine painting San Giobbe Altarpiece