At the estuary of the canal de San Luca, at the San Toma vaporetto stop, here is the immense and severe looking PALAZZO GRIMANI, built on the spot of an ancient Byzantine edifice in the beginning of the 16th century, Renaissance style, work of a Verona architect, Michele Sammichelli. As usual, it presets a three parts composition with a small backyard. The façade is decorated with polychrome marble. Actually the siege of the Appeals Court.  
(www.jack-travel.com) 

See John Singer Sargent's Painting: 

 
Base of a Palace  
1904  
 
Notes: 

• Overview of Venice