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The human figure, and detail were two big features.
Greece and Rome
greece and rome
motet and the mass
traders and visitors
I'd have to say Christianity for certain and with the rise of Islam, then Islam is number two.
There is two culture that is most influenced on renaissance humanism. The to main cultures would be Greek and Roman.
Motet and Mass
Beauty and balance, based on the ideals of the antique.
Collecting was one of the ways of spreading of Renaissance. The another way can be robbing during plundering of Italia (Sack of Rome).
There were only two major Renaissances in Europe. There was the Northern Renaissance and the Italian Renaissance. If you want to know the differences, there is a link below to help you learn the difference between the two and what caused them to happen in different time periods.
The Alps and the Carpathians.