When in Rome, do what the Romans do..
but seriously there's alot..my favourite being Capuchin
crypt..got incorruptible bodies also..
if ur on a strict budget, go to Albergo del Sole for no frills
accomodation..quite cheap..i think around 70-90€..
accomdation is oreadi taken care of.
jus wanna noe those must-see attractions, eg. colsseum..