I mention all this because a 12th century Greek manuscript in the Bavarian State Library has now been identified as a series of homilies on the Psalms by Origen of Alexandria. See the article by Catholic World Report and also this blog post which includes instructions on how to view pictures of the entire manuscript.
Lionel at Forget the Channel says:
Plus there's this bloke called Benedict, living in Rome, who used to have something to do with Bavaria:The importance of this find cannot be overestimated.
I wonder how long before we get an edition.[Origen] was a true "maestro", and so it was that his pupils remembered him with nostalgia and emotion: he was not only a brilliant theologian but also an exemplary witness of the doctrine he passed on. Eusebius of Caesarea, his enthusiastic biographer, said "his manner of life was as his doctrine, and his doctrine as his life. Therefore, by the divine power working with him he aroused a great many to his own zeal"