The Knights Beneficent of the Holy City (KBHC) is the anglicised name of a very old and very "elite" masonic body known worldwide as "CBCS", short for "Chevaliers Bienfaisant de La Cite Sainte".
There are several "obediences" in this Order, which do not officially recognise each other, but in England particularly, Regular Membership of CBCS was traditionally restricted to literally just a handful of the most senior Knights Templar!
In 2007 the Grand Priory of Belgium sanctioned England to work the Degrees of the Order, forming part of the Rectified Scottish Rite, in an "Invitation Only" manner.
