Dromon . The dromon-pattern war galley has always interested me, and when LEGO released the Troll Warship it proved ideal for adaptation. Dromons are fast galleys used by the medieval Roman (Byzantine) Empire, distinguished in part by having a central tower at the main mast. This particular one happens to be a fire ship, equipped with a bow-mounted Greek fire-thrower. .
This front-angled shot shows off the length of the ship, the ship's boats, and the Greek fire-thrower. I don't have a sail for the mast, unfortunately. I also lacked sufficient numbers of suitable marines, but have since acquired a decent number (I use the Crown Knights with tabard instead of some variant of scale armor, to represent quilted/padded armor suitable for naval combat). I use older Castle minifigs for the rowers, giving them some measure of armor since they'd be expected to participate in boarding actions.
This illustrates the use of the Greek fire-thrower, with a nice angle on the fire stream hitting the small boats. I have actually changed from using marines to man the pump to using the old Majisto blue peasant outfit with Pirates do-rags.
A close-in view of the fire-thrower further illustrates the carnage that the Roman super weapon was capable of unleashing.
From this view the stern-castle catapult is visible, as are the boarding pikes I have arranged for the oarsmen to use. You can also see the captain of the ship (the armored knight) and the older torso-prints on the oarsmen.
Finally, the overhead shot gives a decent view of the arrangement of the oars (twelve, which was the best I could do at the time), and a slightly more accurate sense of scale (I have since lengthened it, and I'm still working slowly on acquiring more oars; I hope someday to make a two-tiered oar arrangement).