An insulating glass element for the at least partial delimitation of a combustion chamber, having at least two viewing panes, which have at least some areas a transparent glass or ceramic-glass material and are arranged spaced apart from each other while leaving an air chamber, and wherein a viewing area is created at least in parts of the air chamber. The two viewing panes are connected with each other by a temperature-resistant adhesive, and the adhesive encloses a viewing area of the viewing panes all around, or a spacing element, which runs around them at least partially, is connected with the two viewing panes in a material-to-material manner, preferably by a glued connection.