Zol's Castle
Zol's Castle was the first great travelling amtgard castle, meaning it was made of wood and it could be disassembled, loaded onto a trailer, taken to an event and set up again. It consisted of gates, a couple corner towers, and plywood height walls in a general "U" shape. It was used at Claw Camp at the Gathering of the Clans for many years.
Zol's Castle was defaced with magic markers at Spring War III in 1996, apparently because Zol was Ivar Nefarious's squire, and Nevron Dreadstar was mad at Ivar over some playing cards he made of Amtgard Knights, of which the one on Nevron referenced the Nevron Kicking Incident. Nevron himself did not personally do it, and it may have been along the lines of the http://www.eyewitnesstohistory.com/becket.htm affair...
It was pretty obvious who did it as their names were practically signed on their work, and most of them were involved in the attempt to clean it up the next day... there was also allegations that one witness to it had been threatened that night, overall an ugly incident.