 However, the Kolo's (Circle) organizers were Delfa Ivanić and Slavka Subotić, the wife of Jovan Subotić.The humanitarian society was created to provide assistance to Serbs "regardless of ethnic or religious background" during the unrest following the assassination of Alexander I of Serbia.Although known for its charitable work, the Circle of Serbian Sisters also helped the Serbian Chetnik Organization in the Turkish-held lands of Southern Serbia, and to aid the wounded and stricken as Kosovo Maiden did in medieval times.