Geography and Countries

The world is flat. It looks like this:

Roman Empire

The Roman Empire contains Brittania, which contains Londinium. The language is called Latin, but is in fact almost identical to Earth English. The leader of the Empire is called Caesar (formerly "Emperor", but it was renamed when it was first held by a woman).

The Empire uses metal coins for money.

Slavery exists. People become slaves via the Empire conquering new places, debt, parents selling their children, and being born to slave parents. Power plants are run almost entirely by slaves, because it's easier to teach the relevant skills to children who don't learn other things.

Jesus is a currently-alive spiritual leader and activist.

Corporal punishment is common in the judicial system.

Arbiters are a group of seasonchanges who are really dedicated to providing impartial judgments on things.

New Year's country

anyone who physically gets there can stay, no questions asked