Tarascon Castle, also Tarascon Castle, French Château de Tarascon or Château du roi René ("King René's Castle"), is a late medieval castle from the first half of the 15th century in the Provençal town of Tarascon in the Bouches-du-Rhône department . It lies on the left bank of the Rhone. It is considered one of the most beautiful medieval castles in France for its architecture, its location and its good state of preservation.