Dromon

The Dromon was the prime warship of the Byzantine Empire between the 5-12th centuries CE.
They appear to have been constructed in various sizes, used the Lateen sail and carried a syphon to project Greek Fire.

The Dromon was derived from the Liburnian Roman Galley.
It differed in that it had a covered deck and the square Roman sail was replaced by the Lateen sail.
It was also without a Ram.
Artillery had long since replaced Ramming in Galley Tactics.
A syphon for projecting Greek Fire was located in the bows.

Harbour of Eleutherios (c.395 CE)
- This is an excavation site which is not open to visitors. It is located under the Yenikapi district of Istanbul.
- In 2005 whilst digging the East West Bosphorus Rail Tunnel, excavators uncovered the old Harbour of Eleutherios, built by Theodosius I (379-395 CE). It was also known as Harbour of Theodosius (Portus Theodosiacus).
- Excavators unearthed sections of the Wall of Constantine I and 35 Byzantine Ship remains from the seventh to tenth centuries CE including Galleys.

Four galleys found in the Yenikapi excavations date from the 11th century CE and are 98 feet (30m) in length.
Although size seems to have varied, various sources describe small, medium and large Dromons with two masts.