Sovereign Military Hospitaller Order of Saint John of Jerusalem of Rhodes and of Malta v The Sovereign Order of the Orthodox Knights Hospitaller of Saint John of Jerusalem
A lot of allegations you don't see in the average trademark complaint. "Plaintiff was founded in the eleventh century in Jerusalem." "Plaintiff is a sovereign entity." "Defendant falsely claims it is sovereign." "Defendant seeks to reveal secrets of the Holy Grail that are maintained by Plaintiff." Ok, that last one wasn't in the complaint.
Apparently there have been many 'mimic orders' passing themselves off as Knights Hospitallers (See last paragraph here).