In the 13th century a rediscovery of Greek and Roman literature occurred across Europe that eventually led to the development of the humanist movement in the next century. In addition to emphasizing Greek and Latin scholarship, humanists believed that each individual had significance within society. The growth of an interest in humanism led to the changes in the arts and sciences that form common conceptions of the Renaissance.
Revival of ideas spread through print
The 14th century to the 16th century – during which time printing process was invented and which led to pace up the print media communication - was a period of economic flux in Europe; the most extensive changes took place in Italy. After the death of King Frederick II in 1250, emperors lost power in
Italy and throughout Europe; none of Frederick's successors equaled him. Power fell instead into the hands of various popes.
During the Renaissance small Italian republics developed into dictatorships as the centers of power moved from the landed estates to the cities. Europe itself slowly developed into groups of self-sufficient compartments. At the height of the Renaissance there were five major city-states in Italy: the combined state of Naples and Sicily, the Papal State, Florence, Milan, and Venice.
Science
Beginning in the latter half of the 15th century, a humanist faith in classical scholarship led to the search for ancient (hand-written) texts that would increase current scientific knowledge.
Among the works rediscovered were Galen's physiological and anatomical studies and Ptolemy's
Geography. Botany, zoology, magic and astrology were developed during the Renaissance as a result of the study of ancient texts. Since printing techniques were available, it made the task of sending the old research still safe in hand written texts, to scholars living distant countries. Scientific thinkers such as Leonardo da
Vinci,