Windic March

"Map of the Duchy of Carniola, Windic March and Istria", by Johann Homann (1663-1724), after Johann Weikhard von Valvasor (1641-1693): Lower Carniola and Windic March in green
Arms of the Windic March, featuring a traditional Slovene hat

The Windic March (German: Windische Mark; also known as Wendish March) was a medieval frontier march of the Holy Roman Empire, roughly corresponding to the Lower Carniola (Slovene: Dolenjska) region in present-day Slovenia. In Slovenian historiography, it is known as the Slovene March (Slovene: Slovenska marka or Slovenska krajina).