This Checklist is the fourth and final volume in a series describing the silver-stained glass roundels and unipartite panels from the Middle Ages to the eighteenth century, found in public buildings, museums and private collections in the present five provinces of Flanders (Belgium). It also includes new information on already documented and sometimes dispersed roundels and unipartite panels. Furthermore this Checklist also mentions recently discovered collections and related material for the items described in the first three volumes and thus forms an important and indispensable addendum.