The Golden Dawn Temple was chartered by Freemasons Hall on 1st March 1888, as shown below:-
Llewellyn Worldwide - Encyclopedia: Golden Dawn Time Line
On 1st March 1888 in London the Sun rose at 06:50:25am and many lodges align this to one of the four directions, in this case the Nadir, being straight down from North on an astronomy programme, aligning it to either Sirius/Isis or Alnilam/Belt of Orion/Osiris, being the god stars of the ancient Egyptian religion.
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