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.
1962 - ballpoint pens. Also, it was pretty cool to have a fountain pen that had a cartridge instead of having to draw up ink into the reservoir from an ink bottle. We didn't have markers, though. School movies for science always had big demonstration graphs that they wrote on with grease pencils.