The Apotheosis of Athanasios Diakos (Greek: Αποθέωση του Αθανασίου Διάκου) is an oil painting by Konstantinos Parthenis created in 1933.

The oil painting has dimensions 380 x 380 centimeters.

It is exhibited at the National Gallery of Greece.

[1] Athanasios Diakos was a freedom fighter for Greek independence, who was executed by the Ottoman Empire by impalement following the Battle of Alamana.

The painting shows a secular subject in a religious composition, with a cubist style.