Good morning, good afternoon or good night (depending on the moment you read this).
One help please.
I would like to know where I put the .json and .png files from the templates I got on the sites:
https://stonehearth-templates.com/
I learned easy how to install the game mods, but the models still do not understand.
The .json and .png will go into the building_templates folder that is found here: stonhearth/saved_objects/stonehearth/building_templates
The two files? .json and .png? In the same local?
That is correct.
@Cassiano_Hubert The json is the building template itself and the png is the pic you see when choosing a template, as I understand it anyway. 
Thanks to all for reply
And yep Golden, the .PNG its only to see the look like before installing the template.
When I put the two types of files in the local what Avairian sayed, the game do not understand what are that.
The .JSON files presentend some bugs, I will see in the next play and post my experience soon.