Leaf on vellum from a Dutch manuscript Book of Hours.

The border on the recto is in the sophisticated ?fountains?-style with the acanthus leaves in red, green, and dark blue. This decoration is often found in books illuminated by the Masters of the Haarlem Bible. These masters take their name from a three-volume Bible made for the Knights of St. John in Haarlem, Holland. This Bible is described in The Golden Age of Dutch Manuscript Painting by H. Defoer, 1989.
The initial ?I? is done in wonderful pen work! The rubric is in red.
The text is from the Book of Hours translated into Dutch, probably by Geert Grote. Most Books of Hours were in Latin at that time, but Grote thought that even laymen should read religious books!!
To help you brush up your medieval Dutch, here is part of the text on the recto of this leaf, beginning with the I: Dilexi qui?[Psalm 114] Ic minde want die heer sel uerhoren die stemme mijns ghebeets Want tot mi neyghde hi sijn ore . ende in minen daghen sal ic hem anroepen Mi hebben ombeuanghen die droevighe seer des doots.

Reference: bwh202