Is there a way to restart your world, or be able to see the seed number after you start the world game?
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There isn't a way to see it in game, but it's stored in the save file.
In the BronzeAge directory, under "saves", open the world's save file (these files are big, it might take a bit).
The seed is stored on the second line, something like this:
<world schema="1" name="Itera The Lands Of Hammering" seed="62777761" date="1/13/0543 4:13:09 PM" hostility="0.25">
Yours will look slightly different, this is taken from a save from a previous version of Bronze Age.
The next update will add at least one more level of administration center, with higher Administration supply.
If you'd like, you can check out the Tyrrany Mod which adds structures that produce Administration.