Comment by solidsnack9000

The page you link contains many interesting examples; but many of them are simply cases of making the vote harder -- requiring unanimous consent to change English-French bilingualism in Canada, for example -- rather than cases where the law simply can not ever be changed by a vote.

With regards to Germany, the page says:

...if a constitution provides for a mechanism of its own abolition or replacement, like the German Basic Law does in Article 146, this by necessity provides a "back door" for getting rid of the "eternity clause", too.

It's really hard to have a legal system that literally can not be changed by any legitimate vote -- only by revolution -- because what sits at the bottom of most of them (all of them?) is that the consent of some body politic is necessary and sufficient to legitimate a law.