Pope Sixtus IV ( Latin : Xystus IV ; 21 July 1414 - 12 August 1484 ) , born Francesco della Rovere , was Pope from 9 August 1471 to his death in 1484 .
Pope Sixtus IV ( Latin : Xystus Quartus ; 21 July 1414 - 12 August 1484 ) , originally Francesco della Rovere , was an Italian priest of the Roman Catholic Church and the 213th Pope from 1471 until his death in 1484 .