Geography of the Known World

The Known World refers specifically to the parts of the world which posses a known culture and with which there is historical or contemporary record of contact. Only a tiny portion of the world, which is theoretically 30,820 miles in diameter, falls into the categorisation of the Known World.
The Known World is typified by large contiguous land-masses, separated at points by large bodies of water, called seas.
== Regions ==
Although the landmass of the Known World is ultimately contiguous, its people and nations have defined various regions. The criteria for defining these is closely linked to the politics, economics of cultural identity and statehood of the peoples of the Known World. These factors are intertwined with physical geography in the form of bodies of water (seas, rivers and lakes), mountain ranges, and other geographical features and phenomena.
=== Centrelands ===
Main article: Centrelands
==== Geographical Extent ====
The Centrelands region was historically defined by the borders of the Kingdom of Pem at its greatest extent during the Innovation Era. In contemporary geography, the Centrelands encompass the landmass between the Inland Sea, Northern Sea and Great Eastern Sea. It is also bordered in the north-west by the inhospitable Frozen Wastes and in the north-east by the swampy Transmarches. To the south, the Centrelands is demarcated by geographers through a roughly west-to-east line from the Jungle to Chute Gravité. 
==== Nation States ====
The largest nation-state in the Centrelands is the Commonwealth of Pem, which controls the majority of the geographical region. To the north of the Centrelands are a series of city-states descended from the settlements of the Argaivan Orient. To the north-west is the Free City of Rubellium, a powerful maritime nation state on the shores of the Inland sea and bordering the Frozen wastes. To the northern extent of the Centrelands lies the mountainous Grand Duchy of Eparchia, and the port city-state of Archpolonia adjacent to the Northern Sea. 
To the east of Pem lies the swampy Eastern Basin, a region claimed by tribes of the Northern Horde and Southern Horde; Pem has ceded de facto control to these groups, though it maintains claims on the region. The political borders of the southern Centrelands are disputed due to rivalling claims by the Commonwealth of Pem and the Kingdom of Aleuria, a country to the south of the Centrelands. 
=== Greater Hansea ===
=== Hanseatic Landbridge ===
Commonly referred to as Hansea, the Hanseatic Landbridge is now defined as a region in its own right. Although it was 
== Seas ==