Amumu lore question

Hello there! I have a question about amumu (maybe old) lore. On lore contest there was a question. "Whats name om Amumu pyramide?" And i cant FIND any answer on this Q. Dude that asked this question, told that i probably can find this in The Jurnal of Justice. Well, i could not find it:(. Can u help me to find an answer plz. Sorry for my english :*(