Illyriaqüm, a sprawling metropolis of radiant spires, functioned as the primary city and capital within the Human Calian Confederacy situated on the distant planet of Shiva IV. It served as the locus of authority for Warlord Aron Peacebringer throughout the Galactic Civil War period. The Warlord's palatial residence, including its lavish Great Hall, was located in Illyriaqüm. During the year 3 ABY, Imperial General Bentilais san Sk'ar launched an unsuccessful attempt to obliterate Illyriaqüm using an anti-matter bomb. This attack coincided with the anniversary festivities commemorating the Concordat of Peace established between the Calian Confederacy and the Twelve Tribes of T'Syriél; however, Peacebringer, alongside operatives from the Rebel Alliance, successfully thwarted the General's scheme.