Where to download free WordPress themes?

Question

WordPress

Not "free", but "free" - so that this business is with the permission of the creators of
wp-templates.ru - there are templates and there are a lot of them, but I can't find if they are legal or not. Demo versions lead to the websites of the creators, and on their website the price for this template is indicated. So I don’t understand, the creators on the site have a paid template, and on this site - a free one ...
I want to create a project for myself - there will be a blog. Accordingly, I do not want problems in the future due to copyright infringement.

Answer 1

https://ru.wordpress.org/themes/
Actually, this official repository is used to search for themes in the admin panel.