Is there a MILS-like standard for medieval villages and castles? I'm aware of the MILS standard for building large layouts including city and train elements:

This could obviously be adapted for use in medieval layouts, but is there something like this that has already been standardized and put in use by LUGs?
The Modular Medieval Village Standard put together by the Rochester, NY LUG (RochLUG) provides this. It features an underlying support layer very similar to MILS:

Most modules will feature a randomized cobblestone road providing transit between structures:

Structures of various kinds can be added to the modules:

Many modules created by different people can be connected to create convincing medieval villages:

Complete details of the system can be found in the PDF shared by RochLUG.