التحالف المقدس
In 1815, Heilbronn again became a staging area for major armies ahead of the campaign against Napoleon, and 10,000 troops paraded in front of Emperor Franz of Austria and more than one hundred German princes and generals in the "Theresienwiese". Tsar Alexander I of Russia met in Heilbronn with the Baltic Baroness Juliane von Krüdener, who talked him into founding the "Holy Alliance".