Le due scale triangolari di palazzo Barberini. Tipologia, costruzione e ibridazione dal Pantheon al Barocco

The two triangular staircases in the intermediate block of the Pantheon constituted a famous model: the subject of representations, studies, and re-propositions especially in the Renaissance. Perhaps their most famous derivation was the design of the staircase around the circular courtyard of villa Madama in Rome. This paper focuses on a particular declination of such a characteristic antique example at the beginning of the Baroque period: the pair of triangular staircases connected to the Sala Ovale of palazzo Barberini in Rome. A solution of composition that seems – again – a reference to the prototype of the Hadrian's Rotunda. The construction systems are analysed especially in comparison with earlier examples, also derived from antiquity.