Vasiliadis, Thomas wrote:
is there a spezial page "all templates" or any other way to show all templates of a wiki?
Yes, try Spezial:Allpages and pick "Vorlage" from the Namensraum-List.
In English installs, this would be the Special:Allpages page and choosing "Templates" from the Namespace dropdown list.
HÃnandil