John Addington Symonds,
Sketches and Studies in Italy and Greece…
“ In the same year, 1471, Francesco della Rovere was raised to the Papacy with the memorable name of Sixtus IV. Sixtus was a man of violent temper and fierce passions, restless and impatiently ambitious, bent on the aggrandisement of the beautiful and wanton youths, his nephews. Of these the most aspiring was Girolamo Riario, for whom Sixtus bought the town of Imola from Taddeo Manfredi, in order that he might possess the title of count and the nucleus of a tyranny in the Romagna. This purchase thwarted the plans of Lorenzo, who wished to secure the same advantages for Florence. ”
