The world as it was known in the era of Solomon Kane's adventures, circa
1550-1600.
Much of it mapped, but parts of it slightly imperfectly mapped, or pockets still completely unexplored. California for centuries was believed to be an island. Australia and many pacific islands not fully mapped, and the maps of these regions vary greatly until the 1700's.
As a British subject of a still then-rapidly expanding British empire, there are vast universes to explore with a character like Solomon Kane.
