In the centre is the celestial sky. The border has the arms of the United Grand Lodge of England at each corner. Surrounding this is a 4.5m deep mosaic cornice that took nearly two years to make.

• At the top (east) is the Ark of the Covenant and Jacob's ladder with King Solomon and King Hiram, who built the first temple at Jerusalem.
  
• At the right (north) are St George and the Dragon, and the arms of the Duke of Connaught and Strathearn (who was Grand Master when the hall was built).
  
• At the bottom (west) are Euclid and Pythagoras, whose 47th Problem is represented by three squares.
  
• At the left (south) is Helios the sun god on his chariot, the All-Seeing Eye and a five pointed star.
  
• The corner angels represent the four cardinal virtues: Prudence, Temperance, Fortitude and Justice.
  
• The Biblical text is from Chronicles I 17:12-14.
  

Wikidata has entry سالن فراماسون‌ها در لندن (Q1453586) with data related to this item.