Dimitrios Kallergis was a fighter of the Greek War of Independence, major general, politician and one of the most important protagonists of the 3 September 1843 Revolution.

The 3 September 1843 Revolution was an uprising by the Hellenic Army in Athens, supported by large sections of the people, against the autocratic rule of King Otto. The rebels, led by veterans of the Greek War of Independence, demanded the granting of a constitution and the departure of the Bavarian officials that dominated the government. The revolution succeeded, ushering the period of constitutional monarchy and universal suffrage in Greece.