Cennino Cennini 
Treatise on Painting [PDF ebook] 

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. Of all the modes of painting used by the masters of these times, as well as by those who succeeded them, Cennino has composed the most complete treatise that has ever been written. Tambroni.