Sisto IV ,favoritism ,nepotism ,Pope ,Bags B. ,It platinizes ,Melozzo da Forlì ,Rome ,Church ,library ,Vatican ,history of the Church ,Giulio II ,Pontefice , renaissance ,

It platinizes ,Papal court ,Pontefice ,library ,Vatican ,Melozzo da Forlì ,Sisto IV ,Pope ,Bags B. ,nepotism ,favoritism ,recommendation , Middle Ages ,