[2] Kallergis was born in a wealthy family in Crete, then part of the Ottoman Empire.
His father Georgios participated in the failed Cretan revolt of 1866, and consequently the family moved to Athens.
[3] Their relation to Dimitrios Kallergis helped the father get a job in the court of George II.
On May 5, 1890, the day of the funeral of the Greek socialist Rokkos Choidas, Kallergis announced the founding of a new newspaper entitled Sosialistis (Σοσιαλιστής).
[8] On December 1, 1893, Kallergis interrupted a speech by Charilaos Trikoupis in the Greek parliament in order to read the resolution of May 1, signed by one thousand people.
This led to several negative comments about Kallergis in the Greek press, especially the newspaper Asty, organ of the New Party.
The newspaper appeared every two weeks and it contained articles from the intellectuals Kallergis had met in France.
The meeting that led to the foundation of this club took place in Kallergis house on Agiou Markou street.