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.
In the United States, the first successful, commercially produced ballpoint pen to replace the then-common fountain pen was introduced by Milton Reynolds in 1945. It used a tiny ball that rolled heavy, gelatin-consistency ink onto the paper.