Leonardo Da Vinci, Italian painter, draftsman, sculptor, architect, and engineer whose genius, perhaps more than that of any other figure, epitomized the Renaissance humanist ideal. His Last Supper (1495–98) and Mona Lisa (c. 1503–06) are among the most widely popular and influential paintings of the Renaissance. His notebooks reveal a spirit of scientific inquiry and a mechanical inventiveness that were centuries ahead of their time. The unique fame that Leonardo enjoyed in his lifetime and that, filtered by historical criticism, has remained undimmedto the present day rests largely on his unlimited desire for knowledge, which guided all his thinking and behaviour.