Langland's use of moral distichs from the medieval text known as the Disticha Catonis has been noted but never critically examined as a whole. The figure of 'Cato' and the distichs attributed to him stand out in Piers Plowman. I will begin by placing both Piers and the Disticha in their medieval literary context. Questions of audience and literacy have always been central to Piers, and I will look at the way in which Langland's use of Latin quotations from the Disticha relates to these issues. I will also examine the role of ' Cato' and the distichs in Piers in order to dispell the prevailing critical view that 'Cato' represented a pagan authority. The medieval Christian commentaries which accompanied the Disticha illuminate Piers as well. Critics have often wondered why Langland choose to write in a mixture of languages. 'Cato' and the Disticha are part of the answer. / Graduate