The Mark an der Sann (German for "March on the Savinja"; other designations and variations of the name include Sannmark, Sann-Grafschaft (or Markgrafschaft), (Mark)grafschaft Soune, Soun and Saunien, as well as simply Sanntal – Savinja valley) was a border march of the Holy Roman Empire, in the territory of present-day Slovenia. It was established in the second half of the 10th century to protect the Empire against its enemies to the east, especially from Hungarian raids.