Final answer:
While the specific foundational symbol of a sorority's official pin is not provided, common historical and cultural symbols, such as the Fleur-de-lis or Christian symbols like the cross, may be incorporated into the design and represent the organization's heritage and values.
Step-by-step explanation:
The symbolism within sorority and fraternity pins and artifacts can often trace their origins to historical and cultural sources, incorporating meaningful symbols that may define or represent specific ideals, values, or history associated with the organization. While the exact symbol that represents the foundation of a sorority's official pin is not provided in the reference material, symbols like the Fleur-de-lis, which are frequently used in various contexts, including royal emblems and associations with certain figures in history, could serve as foundational imagery. Additionally, Christian symbols like the cross or victory wreath depicted in the Byzantine/Roman fibulae may influence the design of official pins, especially those of organizations with a religious background. Each sorority's choice in symbol often signifies its heritage, purpose, and ideals, and can be a complex representation much like the art objects discussed that are exclusive to the elite and carry significant meaning or status.