Local History The Zeta Sigma Chapter of Sigma Sigma Sigma was chartered on September 11, 1994.   It started when a group of girls wanted to join a sorority but didn't feel that they belonged with the other sororities on Duquesne's campus.  They petitioned to the Office of Greek Life to form their own sorority. Three sororities expressed interest in setting up a chapter at Duquesne, but the Office of Greek Life and the Pan-Hellenic decided on Sigma Sigma Sigma because of their diversity.     The charter sisters of Zeta Sigma adopted a local mascot, the frog. The frog represents longevity and fertility.  Zeta Sigma