He was born on 1852 in Piraeus, while he came from Epirus, for the liberation of which he fought. His father was Ioannis Giannopoulos from Preveza, while his mother was Louisa d’Auria, of Italian origin. Because of his origin he used the nickname Epirus. In 1874 he entered the Law School of the University of Athens, while at the same time he became interested in journalism and literature.

A year later, he moved to Constantinople, where his father was located. In 1876 he interrupted his studies and went to Bari, Italy, where he was the manager of a branch of the industry owned by his uncles on his mother’s side. While in Italy, he attended courses at Italian universities and became a correspondent for Greek newspapers, as well as a writer of poems and short stories for the magazines Rambagas, Nea Idea, Poikili Stoa, Estia and Non Haneesi. He also wrote for Italian newspapers such as Riforma.

The Greek government appointed him Vice-Consul in Bari in 1883, and Consul in 1887. For his services there he was awarded the Silver Cross of the Order of the Saviour. At the same time, from 1883, he was a contributor to the newspaper Acropolis. In 1885 he married Maria-Euridiki Spiliadis, with whom he had 7 children.

From 1888 he was a collaborator of the newspaper, while a year later he returned to Athens when he became its editor-in-chief. In various articles on theatrical and literary criticism he used the pseudonym Thespis. He took a negative position on the use of the demotic. In 1893 he published the book Study of the Economic Situation, and became involved in politics on the side of Charilaos Trikoupis, although he was initially opposed to him.

In the Greek-Turkish War of 1897, he was one of the leaders of the formation of the “Continental Flank“, taking part in the landings and skirmishes in the area of Preveza. He died of cancer on 27 September 1897 in Athens, and his funeral was held at public expense by Archbishop Prokopios II in the Metropolitan Church. He was buried in the 1st Cemetery of Athens.

He was a member of the Council of the Grand Lodge of Greece.