Gianfrancesco Penni
Born in Florence to a family of weavers, Penni entered Raphael's workshop very early in his life, and collaborated with him on several works, including the famous Rooms of the Vatican Palace, as well as the frescoes of Villa Farnesina, both in Rome. Heinrich Wölfflin and some other writers credited him with the entire execution of the Raphael Cartoons, with Raphael only creating the initial design, though more recent writers believe Raphael did much of the work himself.
World Architecture Survey
While the range of responses was very broad, more than half of the experts surveyed named the Guggenheim Museum Bilbao by Frank Gehry as one of the most important works since 1980. The Beijing National Stadium (Bird’s Nest stadium) in Beijing by Herzog and de Meuron was the building most often cited, by seven respondents, as the most significant structure of the 21st century so far. Counted by architect, works by Frank Gehry received the most votes, followed by those of Rem Koolhaas. The result of the survey led "Vanity Fair" to label Gehry as "the most important architect of our age".