This is a medium size medieval Pirat Ship, fits perfect in every midieval harbour or pirate bay.
I found a version of this ship on "Minecraft Schematics" and modified it. In detail i changed the color of the Sails, the top of the ship mast, modified the front and the back of the ship, some minor changes in the decoration of the outside and maximized the space on the inside. The inside is now completely hollow and there is enough space for interior.
Original Ship: https://www.minecraft-schematics.com/schematic/7197/