Here is the codex part about it :
Callista paces on the battlement over the lake. The sky is dark. She holds a cup of poison. Camallia is there, face veiled.
Callista: The dawn is late.
Camallia: It will not come again.
Callista: It must hide 'neath the clouds.
Camallia: It will not come again.
Callista: The queen thinks you dead.
Camallia, her back to the audience, faces Callista, and removes her veil.
Callista moans in fear. She drops her cup.
—From The Setting of the Light by Lumiere Bartlet
These lines are from a play said to have been one of the strangest works of its time. Bartlet was a writer of small repute who died when a fire swept through his pauper's hovel. The Setting of the Light takes place in the mysterious city of Demhe, implied to be another world that somehow becomes our own moon. Accidents, madness, and suicide plagued the first production, and some historians claim that the play's conclusion was at once so hauntingly beautiful and shockingly vile it sparked the Great Riot of Val Royeaux in 4:52 Black.
The truth will forever be a mystery. Only fourteen pages of the play remain.
—From A Compendium of Orlesian Theater, Volume V: Lost or Fragmented Works by Magister Pellinar
Fourteen pages lol, just as the phenix feathers/eyes in the Trespasser mural. Anyway, not much to do with this play, just more strange hints about light, dawn, moon, life and death, and fire again. The play is special if we believe the codex but it is hard to figure what it's about. Mythal's murder ?
Someone had a theory about the elves coming from the moon or something like that, Madrar I think ? I should read some old posts again.
Edit : ok, Demhe is a reference to the King in Yellow ! I will look into this...
http://kinginyellow.....com/wiki/Demhe
The play is clearly a reference to Chambers' King in yellow, or what others authors made with it. Aliens lords and ladies feasting and dancing with masks while the world is ending from an epidemy, and then appear a mysterious messenger bringing doom on them... a city like a mirage... two moons (and two suns if I understand well)...clearly an inspiration for DA writers. We already saw the yellow sign in Skyhold and the scar in the sky in Trespasser, so it makes sense.