Miren Castle (Slovene: Mirenski grad, also known as Grad 'castle' and Naša Gospa pod Krasom 'Our Lady beneath the Karst'; Italian: Grado di Merna or Castello di Merna) is an elevation above the settlement of Miren near Nova Gorica, in southwest Slovenia. Its Slovene name reflects the fact that the hill was once occupied by a castle; it is currently dominated by a collection of ecclesiastical buildings.