Insulating glass unit with illumination device

An insulating glass unit (10) comprising at least one illuminable panel (20) made of a transparent material arranged between at least two mineral glass panels (16, 18), wherein the mineral glass panels (16, 18) are held at a distance from one another by at least one spacer element (14), wherein the illuminable panel (20) is held or supported at least on one longitudinal marginal edge (24) by the spacer element (14), the spacer element (14) is formed by at least one hollow profile (15), the hollow profile (15) comprises a plurality of hollow chambers (26, 28), wherein the at least two outer mineral glass panels (16, 18) each adjoins and/or bears against at least two lateral surfaces of the hollow profile (15), and wherein the illuminable panel (20) rests on or against an intermediate hollow chamber (28), the intermediate hollow chamber (28) is connected by material bridges (30) to at least two lateral hollow chambers (26) that are spaced apart from one another, wherein at least one illumination element (32) is arranged within the intermediate hollow chamber (28), the illumination element (32) illuminates the marginal edge (24) or radiates into the marginal edge (24) in an activated state, and wherein an interior space of the intermediate hollow chamber (28) together with the at least one illumination element (32) located therein is sealed or sealable in a gas-tight manner, or wherein at least one internal space (22) located between the at least two mineral glass panels (16, 18) is sealed or sealable in a gas-tight manner against the intermediate hollow chamber (28).