Answer
Marshall Helbrecht is the Chapter Master of the Black Templars.
If you are talking about the Black templars of the second founding chapter deriving from the Imperial fist in 40k. The Black Templars have been notoriously hard to paint. Upon failing that I recommend seeing the related link below.
Thomas Black Laws has written: 'Recitations for Good Templars'
Yes, Templars are Christians.
Templars Square was created in 1965.
You have to be invited. For Liberty, The Blue Templars
The plural of templar is templars. As in "The templars stormed the castle".
Good Templars Hall was created in 1858.
If you mean the game, and if you mean the assassins, then it is Al Mualim (translated to "the teacher"). If you mean the templars, then it is Robert IV de Sable.
International Organisation of Good Templars was created in 1851.
No. The Templars do Not control the world. The world is governed by many different types of peoples.
Barbara Frale has written: 'The Templars' -- subject(s): History, Military religious orders, Orders of knighthood and chivalry, Templars 'Il papato e il processo ai templari' -- subject(s): Inquisition, Trials, litigation, Trials (Heresy), Templars, History 'The Templars and the shroud of Christ' -- subject(s): Holy Shroud, Templars
J. Willard Crane has written: '\\' -- subject(s): British-American Order of Good Templars, Independent Order of Good Templars, Templars in Canada, Templiers