This is one example of many castles in the medieval time period. There were many parts to a castle. But, it depended on how the castle was built to recognize parts that did and did not appear on the castle built.
Like spray paint, these markers give off volatile organic compounds. Some of the most recently made permanent markers are made from recycled plastic.[citation needed] The permanent marker was invented in 1952 by Sidney Rosenthal.
The historical markers program was administered by the State of Kansas through the Kansas Historical Society and the Kansas Department of Transportation. The first of these historical markers was erected in 1938, more were added from the 1940s through 1960s.