The Renaissance was a cultural movement that spanned the period roughly from the 14th to the 17th century, beginning in Italy in the Late Middle Ages and later spreading to the rest of Europe. Though availability of paper and the invention of metal movable type sped the dissemination of ideas from the later 15th century, the changes of the Renaissance were not uniformly experienced across Europe. Historians often argue this intellectual transformation was a bridge between the Middle Ages and Modern history. Although the Renaissance saw revolutions in many intellectual pursuits, as well as social and political upheaval, it is perhaps best known for its artistic developments and the contributions of such polymaths as Leonardo da Vinci and Michelangelo, who inspired the term "Renaissance man". There is a consensus that the Renaissance began in Florence, Italy, in the 14th century. Various theories have been proposed to account for its origins and characteristics, focusing on a variety of factors including the social and civic peculiarities of Florence at the time; its political structure; the patronage of its dominant family, the Medici; and the migration of Greek scholars and texts to Italy following the Fall of Constantinople at the hands of the Ottoman Turks.