Illusionistic ceiling painting, which includes the techniques of perspective di sotto in sù and quadratura, is the tradition in Renaissance, Baroque and Rococo art in which trompe-l'œil, perspective tools such as foreshortening, and other spatial effects are used to create the illusion of three-dimensional space on an otherwise two-dimensional or mostly flat ceiling surface above the viewer. It is frequently used to create the illusion of an open sky, such as with the oculus in Andrea Mantegna's Camera degli Sposi, or the illusion of an architectural space such as the cupola, one of Andrea Pozzo's frescoes in Sant'Ignazio, Rome. Illusionistic ceiling painting belongs to the general class of illusionism in art, designed to create accurate representations of reality.
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Quadratura in the context of Baroque architecture
Baroque architecture is a highly decorative and theatrical style which appeared in Italy in the late 16th century and gradually spread across Europe. It was originally introduced by the Catholic Church, particularly the Jesuits, as a means to combat the Reformation and the Protestant church with a new architecture that inspired astonishment, reverence and awe. It reached its peak in the High Baroque (1625–1675), when it was used in churches and palaces in Italy, Spain, Portugal, France, Bavaria and Austria. In the Late Baroque period (1675–1750), it reached as far as Russia, the Ottoman Empire and the Spanish and Portuguese colonies in Latin America. In about 1730, an even more elaborately decorative variant called Rococo appeared and flourished in Central Europe.
Baroque architects took the basic elements of Renaissance architecture, including domes and colonnades, and made them higher, grander, more decorated, and more dramatic. The interior effects were often achieved with the use of quadratura (i.e. trompe-l'œil painting combined with sculpture): the eye is drawn upward, giving the illusion that one is looking into the heavens. Clusters of sculpted angels and painted figures crowd the ceiling. Light was also used for dramatic effect; it streamed down from cupolas, and was reflected from an abundance of gilding. Twisted columns were also often used, to give an illusion of upwards motion, and cartouches and other decorative elements occupied every available space. In Baroque palaces, grand stairways became a central element.
Quadratura in the context of Andrea Pozzo
Andrea Pozzo (Italian: [anˈdrɛːa ˈpottso]; Latinized version: Andreas Puteus; 30 November 1642 – 31 August 1709) was an Italian Jesuit brother, Baroque painter, architect, decorator, stage designer, and art theoretician.
Pozzo was best known for his grandiose frescoes using the technique of quadratura to create an illusion of three-dimensional space on flat surfaces. His masterpiece is the nave ceiling of the Church of Sant'Ignazio in Rome. Through his techniques, he became one of the most noteworthy figures of the Baroque period. He is also noted for the architectural plans of Ljubljana Cathedral (1700), inspired by the designs of the Jesuit churches Il Gesù and S. Ignazio in Rome.