Ludza Castle (Latvian: Ludzas pils) was a medieval castle built in Gothic style located next to a Catholic church, on the site of a former Latgalian wooden castle in the centre Ludza, Latvia, a small town in eastern Latgale. Its main purpose was to be an eastern outpost to control trade routes from Russia. Nowadays the impressive fragments of the castle walls, including a three-floor high fragment, still remain. The ruins are the main tourist attraction in the Ludza District, and is considered a symbol of the town.