Here is a painting, just completed, of King David. As the author of so many of the psalms and a musician, he seems to me to be patron of the liturgical renewal! This image is based upon the one that is the the early 13th century English illumination in the Westminster Psalter. The dimensions of the internal image (i.e. without the border) are 10" x 6". So like the original this has the ratio of 5:3 which is one of the fundamental ratios that one sees in gothic proportion.