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.