The Castle houses artworks and crafts of European, national, or regional significance as well as weapons and every-day items from 8 centuries. The Gallery shows photographs of the interiors that are visited during the guided tour. The entrance to R?benach House was converted into an Armoury during the Romantic period.

Inside Eltz Castle (Burg Eltz), visitors find one of the most well-preserved medieval interiors in Germany, as the castle has remained in the same family for over 800 years and was never destroyed. The interior is divided into several houses, with the Rübenach and Rodendorf sections open to the public. These rooms are filled with original period furnishings, including intricate 15th-century murals, opulent canopy beds, and rustic kitchen quarters that showcase life in the Middle Ages. A major highlight is the Treasury and Armoury, which houses over 500 world-class exhibits such as gold and silver artifacts, precious jewelry, porcelain, and a formidable collection of historical weaponry including suits of armor, cross-bows, and swords. The castle also contains the "Dukatenscheisser" (the Man Shitting Gold), a whimsical ivory and gold-plated figure from the 17th century.