https://www.youtube.com/watch?v=3qqifEdqf5g

National Geographic Posted this video of ancient wind mills in an Iranian village. They sort of look like rows of trees with vertical boards connecting their branches. They are used for  milling grain. Video says they are one thousand years in use. Caretaker is old and can't find a new caretaker.

That's interesting Alfrun, I wonder if there are any drawings or plans for how they built them ?

Looks like the walls were built to capture and move the wind past the vanes.

I wonder if they use any lubrication on the top and bottom?

There are a few other websites that talk about this.

reorient Mag

In 2002, the windmills were recognized as a national heritage site by Iran.

In the film within the article above, he says that the wheat acts as the lubrication between the stones.

This site has some basic plans towards the end of the page.
http://naturalhomes.org/nashtifaan-windmills.htm