How to live with art - Tafelreliquiar

Often I've been thinking that art should be part of everyday life and should also be something that one can carry around - not just in one's mind but for real. Similarily often I found the most intriguing pieces at exhibitions the sketchbooks, something the artists have lived with and something that had the air of having been loved , adored and lived.
Something similar though in a religious context I once came across at an exhibition at the Schnütgen Museum in Cologne, they displayed some panel reliquaries that were rather small and could be carried around.