Across Piazzetta San Marco from the Palazzo Ducale lies the gracious form of what Palladio described as the most sumptuous palace ever built. Designed by Jacopo Sansovino in the 16th century, the building occupies the entire west side of the piazzetta and houses the Libreria Nazionale Marciana (National Library of St Mark, aka Biblioteca di San Marco or Libreria Sansoviniana, after its architect) and the Museo Archeologico.
The library extends around the corner on the waterfront into what was once La Zecca, the Republic's mint. It is a masterpiece of the Renaissance, featuring an arcade of Doric columns on the ground level, Ionic ones above and a series of 25 statues of various heroes and gods on the roof.