The Giuliano di Piero de' Medici reference article from the English Wikipedia on 24-Apr-2004
(provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Giuliano di Piero de' Medici

For thoughtful child sponsors

Giuliano de' Medici (1453 - 26 April, 1478), second son of  Piero de' Medici (the Gouty).

As the opening stroke of the Pazzi Conspiracy, he was assassinated in the Cathedral of Santa Maria del Fiore by Franceso de' Pazzi and Bernardo Baroncelli.

His illegitimate son with his mistress Fioretta Gorini, Giulio, went on to become Pope Clement VII.

He is buried with his brother Lorenzo, Il Magnifico, in the Medici Chapel of the Church of San Lorenzo; their tomb is ornamented with the Madonna and Child of Michelangelo.