The Renaissance began in 14th century Italy and spread across Europe over the following two centuries. It was a period of cultural, artistic, political, and scientific "rebirth" as European scholars rediscovered ancient Greek and Roman knowledge and emphasized humanism, individualism, and classicism. Notable early figures included humanists like Petrarch and artists like Giotto in Florence. The Renaissance saw many innovations in art, architecture, philosophy, science, and literature that transformed European culture and challenged the authority of the Catholic Church.