Her online picture is much better than the one I took and her interests wider than the psalter. But medieval Psalters have some lovely images in the first letter of each psalm - very widely varying. As the abstract for this talk indicates, "Psalters were produced in relatively large numbers and attracted the best artistic talent... There is evidence that often it was the only book that a person might own, and which accompanied them throughout their life." Psalms were known in the Latin by their opening words.
Much of the talk was around miniatures taken from the New Testament and inserted into the psalm's first letter.
|Entry into Jerusalem|
You can find images online by googling medieval Psalters, initial letters, and variations. There are lots online at the Bodleian e.g. here. There are many more online that are less fuzzy and without copyright notice.