S. Sebastian, The Martyrdom of, [53]

Scalza, Ippolito, [80], [82]

Signorelli, Antonio, [10], [115]

Signorelli, Francesco, [115]

Signorelli, Luca, little known of his life, [1];

Vasari on, [1];

birth, [2];

studied painting under Pier dei Franceschi, [2];

influence of Antonio Pollaiuolo and Donatello, [3], [4];

gap in his biography, [4];