The invention relates to an insulating glazing having a transparent or translucent outer shell with surfaces (1, 2), and having a transparent or translucent inner shell with surfaces (3, 4), which define an intermediate space. According to the invention, a translucent insulating material body placed in this intermediate space provides a distinct improvement in heat insulation. An inventive insulating glazing comprises a insulating material body (30) that is comprised, in essence, of translucent pyrogenic silicic acid (31). The pyrogenic silicic acid (31) forms a matrix for incorporating aggregates (32) having a daylight effect such as glass fibers (320) and microglass spheres (321). These additives make it possible to vary the daylight properties as well as the permeability to light and energy of an inventive insulating glazing without losing the extremely good heat insulation of the pyrogenic silicic acid (31). According to the invention, the transparent or translucent shells (10, 11) of the inventive insulating glazing are constructed separately.