"This Order, which at various times in the progress of its history received the names of Knights Hospitalers, Knights of St. John of Jerusalem, Knights of Rhodes, and lastly, Knights of Malta, was one of the most important of the religious and military orders of knighthood which sprang into existence during the Crusades which were instituted for the recovery of the Holy Land. It owes its origin to the Hospitalers of Jerusalem, that wholly religious and charitable Order which was established at Jerusalem, in 1048, by pious merchants of Amalfi for the succor of poor and distressed Latin pilgrims....
"The Organization of the Order in its days of prosperity was very complicated, partaking of both a monarchial and a republican character. Over all presided a Grand Master, who, although invested with extensive powers, was still controlled by the legislative action of the General Chapter....
"...There are now two bodies-one Catholic and the other Protestant, but each repudiates the other....
"The degree of Knight of Malta is conferred in the United States as "an appendant Order" in a Commandery of Knights Templar. There is a ritual attached to the degree, but very few are in possession of it, and it is generally communicated after the candidate has been created a Knights Templar...."
- An Encyclopedia of Freemasonry and Its Kindred Sciences," etc. by Albert G. Mackey, M.D., Thirty-Third Degree, Volume I, published by the Masonic History Company, Chicago, New York, & London, 1925, Volume One, pp. 392-95:
Now you try Opus Dei and see what you can find.