Altwied Castle, Medieval castle in Neuwied, Germany

Altwied Castle is the ruined ancestral seat of the counts of Wied, standing on a rock spur in the narrow Wied valley about 5 km north of Neuwied. The river loops around the spur on three sides, and the Wiedtalstrasse (L 255) runs close by. The ruin rises 25 metres above the valley floor at roughly 100 m above sea level. It is a thick-walled castle with multiple concentric rings of walls, and its interior is closed to the public.

The castle's foundation dates to the early 12th century, when the von Wied family was establishing their power in the region. Over several generations, the fortifications were expanded and reinforced.

The name Altwied ("old Wied") only came into use after 1653, when Count Friedrich founded Neuwied on the Rhine; before that the site was called Niederwied, and in 1301 a document records the "comicia de Niderwide". The village chapel below the castle, built in the 13th or 14th century, served for a time as a burial place of the comital family. The ruin is private property of the family zu Wied and closed to the public.

The ruin is private property of the zu Wied family and closed to the public; the interior cannot be entered. It stands on a rock spur in the narrow Wied valley about 5 km north of Neuwied centre, beside the Wiedtalstrasse (L 255). The rock rises 25 m above the valley floor, and the site lies at roughly 100 m above sea level.

The fortification was never destroyed by enemy attack despite its strategic location and strong defenses. This resilience during a period of frequent conflicts makes it a rare example of continuous power in the region.