The ruins of Thurant Castle stand on a wide slate hill spur above the villages of Alken on the Moselle in Germany. The castle is in the district of Mayen-Koblenz in Rhineland-Palatinate and belongs to the spur castle type. Vine gardens on the sunniest slope.
From the mid-13th century the archbishops of Cologne and Trier were joint owners and had their respective property managed by burgraves. As a result, each half of the castle had its own bergfried, living/domestic buildings and entrance.
From the early 16th century the double castle gradually fell into disrepair and was made a complete ruin during the destruction wrought by the War of the Palatine Succession.