House of Regional History Kastellaun The House of Regional History is located in the lower castle of the castle ruin Kastellaun. Opened in 2007, it offers interesting insights into the ways of life of the Celts and Romans over four floors, information about the Middle Ages, the Cold War and several special exhibitions. There are finds from the period 500 BC. until 400 AD to see. The exhibitions have been prepared for children and young people, it is a must for all city visitors.