the present invention relates to a composite panel based on cementitious mortar , passed through its entire thickness by a plurality of through openings , each of which is filled with a material transparent to light in the form of a preformed plate housed in said opening , or formed in said opening , wherein said cement - based mortar contains at least 30 kg / m 3 of fibers selected from one or more of the following types : metallic fibers , steel fibers , glass fibers , polymeric resin fibers . the invention also relates to methods of production of said panel .