Filiki Eteria
Sekeris was initiated into the Filiki Eteria by Panagiotis Anagnostopoulos on 5 May 1818, in Constantinople, as it seems from a letter that he sent to his brother, Georgios Sekeris. Georgios was studying in Paris and was the first member who was initiated into the Filiki Eteria, immediately after its establishment (the initiation, by Nikolaos Skoufas, took place in Moscow in 1814).