How exactly did Leonardo Da Vinci influence art in general?

Can some help me get research sources on leonardo da vinci's art?

• AP world project and i have no clue WHERE to start? basically my whole summer is riding on if i get a good grade on this project... so whats a few sources that i can some reliable information on him and his art and how his art effected the renaissance time period. please help?! a little desperate :(

• Answer:

  "The High Renaissance style begins with the Last Supper of Leonardo da Vinci(1452-1519), painted in Milan while Leonardo was living there under the patronage of Ludovico the Moor." "These are the qualities of the High Renaissance style: simplicity; austere rejection of the incidental and the merely pretty; nobility and grandeur in the figures involved in actions of depth and significance." http://vlib.iue.it/carrie/texts/carrie_books/gilbert/07.html http://www.yesnet.yk.ca/schools/projects/renaissance/davinci.html http://www.google.com/search?q=leonardo+da+vinci&hl=en&biw=1345&bih=602&site=webhp&prmd=ivnsob&tbs=tl:1&tbo=u&ei=RIjoTfrfNsGdgQeSp9iTAQ&sa=X&oi=timeline_result&ct=title&resnum=20&ved=0CJwBEOcCMBM http://en.wikipedia.org/wiki/Leonardo_da_Vinci http://www.mos.org/leonardo/