A term formerly appliedtowindow-shutters, the folding-doors of closets, &c., especially to those of the almeries and the repositories of reliques, formerly so numerous in churches: some pieces of sacredsculpture and paintings also were protected by light folding-doors or leaves, particularly those over altars, and the insides of the leaves themselves were often painted, so that when turnedback they formed part of the general subject… (Parker, 1896)
