Palazzo Santa Sofia is known as Ca' d'Oro ('golden house') due to the gilt and polychrome external decorations which once adorned its walls.
The palace was built between 1428 and 1430 for the Contarini family, who provided Venice with eight Doges between 1043 and 1676. The architects of the Ca d'Oro were Giovanni Bon and his son Bartolomeo Bon.
Following the fall of the Venetian Republic in 1797, the palace changed ownership several times. One 19th century owner, the ballet dancer Marie Taglioni, removed the Gothic stairway from the inner courtyard and destroyed the ornate balconies overlooking the court.
In 1894, the palace was acquired by its last owner, baron Giorgio Franchetti; throughout his lifetime, he amassed an important art collection and personally oversaw its extensive restoration, including the reconstruction of the stairway and the Cosmatesque courtyard with ancient marbles. In 1916, Franchetti bequeathed the Ca' d'Oro to the Italian State. It is now open to the public as a gallery: Galleria Giorgio Franchetti alla Ca' d'Oro.
The principal façade of Ca' d'Oro facing onto the Grand Canal is built in the Bon's Venetian floral Gothic style. Other nearby buildings in this style are Palazzo Barbaro and the Palazzo Giustinian. This linear style favoured by the Venetian architects was not totally superseded by the Baroque one until the end of the 16th century.
On the ground floor, a recessed colonnaded loggia gives access to the entrance hall directly from the canal. Above this colonnade is the enclosed balcony of the principal salon on the piano nobile. The columns and arches of this balcony have capitals which in turn support a row of quatrefoil windows; above this balcony is another enclosed balcony or loggia of a similar yet lighter design.
References:The Clementinum is a historic complex of buildings in Prague. Until recently the complex hosted the National, University and Technical libraries, the City Library also being located nearby on Mariánské Náměstí. The Technical library and the Municipal library have moved to the Prague National Technical Library at Technická 6 since 2009. It is currently in use as the National Library of the Czech Republic.
Its history dates from the existence of a chapel dedicated to Saint Clement in the 11th century. A Dominican monastery was founded in the medieval period, which was transformed in 1556 to a Jesuit college. In 1622 the Jesuits transferred the library of Charles University to the Klementinum, and the college was merged with the University in 1654. The Jesuits remained until 1773, when the Klementinum was established as an observatory, library, and university by the Empress Maria Theresa of Austria.