If you are interested in the history of the use of the Psalms during the Middle Ages, please watch this intriguing lecture on the Psalter and illiminated manuscripts by Dr Sally Dormer. I really enjoyed it. This address highlights how the Psalms have gone in and out of fashion and how they have been used, especially by royalty and nobility.
The video link is here and the transcript for the talk can be found here. For a pdf file of the images used in this talk, please use this link. If Youtube doesn’t suit you, or you wish to explore further, the Gresham College page for this talk is here.