Darn Rowan is a fortress in the duchy of Rowan in the hinterlands of Nilfgaard. The keep was sometimes used to house political prisoners.
Darn Rowan features in the novels Czas pogardy ("Times of Anger"), Chrzest Ognia ("Baptism of Fire"), Wieża Jaskółki ("The Swallow's Tower") and Pani jeziora ("Lady of the Lake").