In the video of the Pegasus "Museum" https://www.youtube.com/watch?v=DnT9QzmMAe4

WOAH! Excellent! joeysaperv noticed that the upper room does NOT show in the picture at 2:22 but it does at 2:14. Looks to me that it is digitally erased at 2:22. That is VERY SUSPICIOUS!!!!!!!! Another theory that I am considering it that it is a ceremonial room. Alefantis had that special design for the roof, the music conductor like podium with a light looks perfectly positioned for someone to use as "master of ceremonies", the slice of a tree for a table looks like some occult type table, the upper room digitally removed at 2:22 may be used for some sort of preparation of ceremonial materials.