Illyriaqüm was the capital city of the Human Calian Confederacy on the remote planet Shiva IV, containing the seat of Warlord Aron Peacebringer's power during the era of the Galactic Civil War. A large city of gleaming towers, Illyriaqüm was home to the and its richly appointed Great Hall. In 3 ABY, Imperial General Bentilais san Sk'ar attempted to destroy Illyriaqüm with an anti-matter bomb during anniversary celebrations of the Concordat of Peace between the Calian Confederacy and the Twelve Tribes of T'Syriél, but was foiled by Peacebringer and agents of the Rebel Alliance.