The Renaissance - General Information:
From the Annenberg Foundation (a non-profit educational foundation), this website is an excellent introduction to how the Renaissance began.
From the Museo Galileo in Florence, Italy. This is a museum website exhibition including 3D simulations of da Vinci's mechanical devices. Browse through his works of art, manuscripts, and find biographical information.
"Without having seen the Sistine Chapel one can form no appreciable idea of what one man is capable of achieving." -- Johann Wolfgang Goethe in 1787 in Rome
From the PBS series "Medici: Godfathers of the Renaissance" this site is filled with art links and additional resources.
An exhibition from the US National Library of Medicine. Although Harry Potter is a work of fiction, the science, medicine, and magic are partially based on Renaissance traditions of alchemy, astrology, and philosophy.