An insulating glazing includes two glass sheets that are spaced apart by an air- or gas-filled cavity, a spacer arranged at periphery of the glass sheets and that keeps the glass sheets spaced apart, the spacer being transparent and placed on one of the sides of the glazing, and a first barrier that is leaktight to water, formed by a structural seal, the material of which is watertight, and a second barrier that is leaktight to gases and to water vapor, the first and second barriers associated to the transparent spacer being made of transparent material, wherein the second barrier that is leaktight to gases and to water vapor and made of transparent material is arranged at an interface between the glass sheets and the transparent spacer on an internal side of the glazing, the structural seal also at the interface being positioned abutted and aligned with the second barrier.