The Triere is the most famous and celebrated classical "heavy" unit of the Antique fleets. Greek Invention, taking advantage of by Admiral Themistocles at the battle of Salamis, where he defeated the Persian fleet of Xerxes in 480 BC. J., the triere was obtained by adding a rower and a bench to the Diere, to reach 170 rowers. Scarcely larger and longer than the Diere, but a little heavier (about 80 to 85 tons), the Triere was considerably faster and devastating than dieres and older Pentekonters. The triere was famous also by the enigma to the historians who wondered how to manage the swimming with such a disposition of the rowers. Napoleon III reconstructed and tested one on the seine, which only reinforced the mystery, while through more recent reconstructions, modern archeology gives its answer, supported by frescoes, paintings, mosaics, bas-reliefs, sculptures as iconographic evidence and texts. The triere demonstrated that it was quite manageable by playing along the length of the oars and physical condition of the rowers, and relatively effective for the time. Replenishments: Napoleon III was passionateed like most of his contemporaries (Romantic period, mid-XIXth Century) by ancient civilizations. He helped to clarify the triere mystery on his personal funds. His disappointing essays only deepened the enigma. John Morrison and John Coates, in 1988 reconstituted the "Olympias", a Greek trireme of 500 BC, and solved the problem. The lessons learned from this empirical experience with Thor Eyerdhal deserve a complete dossier. Here is the unpublished report of this experiment signed John Morrison and published in issue 183 (June 1993) of the files of the archeology: "At an international conference deliberately called" Advisory discussion "held in April 1983 at the National Maritime Museum in Greenwich, Dr. Coates and I proposed the proposed reconstruction of a triple Athenian V And the sixth century BC Following this conference, the "Trireme Trust" was created in Britain, which was later invited by the Hellenic navy to collaborate with it in order to construct a trireme grandeur nature according to the concepts we Developed. This ship, launched in June 1987 in Piraeus and named "Olympias", was put into service after the technical tests to which it was submitted in August of the same year by the Navy and the trust acting in concert. Trials followed in 1988, 1990 and 1992. 1993 marks the tenth anniversary of the start of the project. It is planned to sail the Olympias in June on the Thames to participate in the Anglo-Greek celebration of the 2500th anniversary of the birth of democracy in Athens. The ship will draw the attention of scholars and the public of Western Europe. It is therefore appropriate to review the aims of its construction, to examine what it has accomplished, to evaluate what it represents today and to draw lessons from the teaching it has given us (More to follow).