The church was designed in sober Renaissance style by Jacopo Sansovino in 1554, with the advice of the Franciscan friar, Fra Francesco Zorzi. Fra Zorzi based the sizing of the various elements on the number three, because of its association with the Trinity: the nave should be nine paces wide and 27 paces long, each side chapel three paces wide. However the white marble façade (1564-1570) was not based on Sansovino's designs, but instead was a product of an Andrea Palladio. It is thought that the patrician Daniele Barbaro lobbied for the commission to be switched from Sansovino to Palladio in 1562, convincing the then Patriarch, Giovanni Grimani.