The Apotheosis of Athanasios Diakos

The Apotheosis of Athanasios Diakos (Greek: Αποθέωση του Αθανασίου Διάκου) is an oil painting by Konstantinos Parthenis created in 1933. 
Description.
The oil painting has dimensions 380 x 380 centimeters. It is exhibited at the National Gallery of Greece. 
Theme.
Athanasios Diakos was a freedom fighter for Greek independence, who was executed by the Ottoman Empire by impalement following the Battle of Alamana.
Analysis.
The painting shows a secular subject in a religious composition, with a cubist style.