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Who was Carlo Maderno and how did he influence Francesco Borromini?

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Carlo Maderno (1556–1629) was a prominent Roman architect who defined the early style of Baroque architecture. Serving as the chief architect for Saint Peter’s Basilica, he is best known for designing its nave and facade, as well as the Palazzo Barberini.1

Maderno served as a crucial mentor to Francesco Borromini. After Borromini arrived in Rome in 1620, he worked as a draftsman and stonemason in Maderno’s office. Maderno quickly recognized Borromini’s talent, leading to a close professional collaboration. Their influence on one another included:2

  • Mentorship and Training: The two worked together on complex architectural problems at St. Peter’s.2
  • Collaborative Projects: For the Palazzo Barberini, Maderno established the basic concept, while entrusting Borromini with the realization of specific details. They also collaborated on the facade design of Sant’Andrea della Valle, where Borromini was permitted to design the lantern of the dome.2
  • Professional Foundation: While Maderno’s style dominated their early joint work, the experience allowed Borromini to refine his own architectural identity, which later evolved into his signature use of plastic volumes and articulated space.2