Sixty-five fifteenth- and sixteenth-century roundels and additional Swiss panels can be seen in a new exhibition at the Museum für Sakrale Kunst und Liturgie in Heidelberg (south-west Germany). The roundels belong to Dr Klaus Tiedemann. They are illustrated and discussed in his excellent Gemalt auf Glas & Licht (Painted on Glass and Light) catalogue published in 2009, see Vidimus 29.