One argument suggests that the altar was dedicated to Zeus Eleutherios ( Zeus the Liberator ) and was used to celebrate the Eleutheria festival Thrasybulus of Syracuse in 466 and feature the sacrifice of 450 bulls .
The Eleutheria festival commemorated the expulsion of the last Deinomenid tyrant .
One argument suggests that the altar was dedicated to Zeus Eleutherios ( Zeus the Liberator ) and was used to celebrate the Eleutheria festival , which commemorated the expulsion of the last Deinomenid tyrant , Thrasybulus of Syracuse in 466 and feature the sacrifice of 450 bulls .