Stone castles are large, fortified structures built primarily from stone. They were commonly constructed during the Middle Ages in Europe to provide protection against invaders. These castles often featured thick walls, towers, and moats, making them difficult to attack. Inside, they housed living quarters, storage rooms, and sometimes even chapels. The design of stone castles varied by region and purpose. Some famous examples include Neuschwanstein Castle in Germany and Edinburgh Castle in Scotland. Over time, many stone castles became symbols of power and wealth, serving as residences for nobility and royalty while also playing crucial roles in local governance and defense.