Jacopo d'Antonio Sansovino was an Italian Renaissance sculptor and architect, best known for his works around the Piazza San Marco in Venice. These are crucial works in the history of Venetian Renaissance architecture. Andrea Palladio, in the Preface to his Quattro Libri was of the opinion that Sansovino's Biblioteca Marciana was the best building erected since Antiquity. Giorgio Vasari uniquely printed his Vita of Sansovino separately.

Piazza San Marco, often known in English as St Mark's Square, is the principal public square of Venice, Italy, where it is generally known just as la Piazza. Almost all the other urban spaces in the city are called campi ("fields"). The Piazzetta is an extension of the Piazza towards San Marco basin in its southeast corner. The two spaces together form the social, religious and political centre of Venice and are referred to together. This article relates to both of them.