High Quality Content by WIKIPEDIA articles! Mirna (German: Neydeck or Neudegg) is a nucleated village and a minor economic centre in central Lower Carniola, Slovenia. It is the largest settlement of the Mirna Valley and the centre of the Municipality of Mirna. It is situated at the crossing of regional roads and a confluence of several creeks with the Mirna River, along the railway linking Trebnje and Sevnica.