Diadem Square existed within the boundaries of Coronet City, which served as the capital city for the planet of Corellia. The Acolytes of the Beyond selected this square as the primary site for a revolution they orchestrated. Sometime between the years of 34 ABY and 35 ABY, Strono Tuggs made a stop at a food stand in Diadem Square to purchase some Corellia Chews.