Like many of the other rooms on this floor, this room was used as a rifle depot and storage room. In the 19th century it was converted for other purposes and over the years has been used as a library and office.
Gustav II Adolf's antechamber is suitable for smaller lectures and conferences in cinema and school settings. The room can also be used as a break room and group or anteroom in connection with meetings in King Gustav's Salon. The room can only be rented separately if King Gustav's Salon is unbooked.