John William Draper,
History of the Intellectual Development of Europe…
“ Boniface VIII. elected pope.So Benedetto Gaetani, whether by such wily procurements or not, became Pope Boniface VIII., A.D. 1294. His election was probably due to King Charles, who held twelve electoral votes, the bitter personal animosity of the Colonnas having been either neutralized or overcome. The first care of Boniface was to consolidate his power and relieve himself of a rival. In the opinion of many it was not possible for a pope to abdicate. ”
