Black Rod 1350 by royal letters patent, though the current title dates from 1522. The position was adopted by other members of the Commonwealth when they adopted the British Westminster system. The title is derived from the staff of office, an ebony staff topped with a golden lion, which is the main symbol of the office's authority. A ceremonial rod or staff is a common type of symbol indicating the authority of the office-holder. Depictions of ancient authority figures in many cultures include such a rod (alternatively called a sceptre). Another early example was the fasces (literally a bound bundle of rods)
Caduceus as a symbol of medicine significance of both symbols. This has occasioned impassioned remarks by those frustrated with the continuing confusion. It has been observed that the caduceus is particularly inappropriate for use as a medical symbol due to its long associations with the Greek god Hermes, who was patron of commerce and traders as well as thieves, liars, and gamblers. On the other hand, it has also been remarked – not without considerable irony – that commercial aims in medicine, especially in the United States of America, make the caduceus "an appropriate symbol", at least for some physicians. Others are unapologetic about the association