Sistine Chapel n 1: the private chapel of the popes in Rome; it was built by and named after Sixtus IV in 1473
Sistine \Sis"tine\, a.[It. sistino.] Of or pertaining to Pope Sixtus. [1913 Webster] {Sistine chapel}, a chapel in the Vatican at Rome, built by Pope Sixtus IV., and decorated with frescoes by Michael Angelo and others. [1913 Webster]