Italian Renaissance painting an impressive Classical fresco of the sea nymph, Galatea, outstanding portraits with two popes and a famous writer among them, and, while Michelangelo was painting the Sistine Chapel ceiling, a series of wall frescoes in the Vatican chambers nearby, of which "the School of Athens" (1509-11) in the Stanza della Segnaturais is uniquely significant. This fresco depicts a meeting of all the most learned ancient Athenians, gathered in a grand classical setting around the central figure of Plato, whom Raphael has famously modelled upon Leonardo da Vinci. The brooding figure of Heraclitus who sits by a large block of stone,
Sistine Chapel Choir Thus the ""magister capellae"" came immediately after the cardinals, followed, in the order given, by the ""sacrista"", ""cantores"", ""capellani"" and ""clerici"". With the building by Sixtus IV (1471–84) of the church for the celebration of all papal functions since known as the Sistine Chapel, the original ""schola cantorum"" and subsequent ""capella pontificia"" or ""capella papale"" became the ""capella sistina"", or Sistine Choir. Up to this time the number of singers had varied considerably, there being sometimes as few as nine men and six boys. By a Bull dated November, 1483, Sixtus IV fixed the number at twenty-four, six for each