This book offers a comprehensive study of the Metaphrasis of the Psalms by Byzantine poet Manuel Philes (fourteenth century). It contains the first critical edition of the entire text (about 3,500 verses), where Psalms and their metaphraseis are displayed synoptically. The introduction provides a complete examination of the manuscripts; a survey of the language and the metre of Philes’ metaphrasis; and a study of how and why Philes rephrased the text of the Psalms.