I don’t exactly know what the intricate pattern is, all I know is that it was taken in Catedral de Mallorca. The glow was the reflection of the sunlight against the cathedral’s stained glass windows.
Heavenly glow
Getting those creative juices flowing
Vero Supertramp 
it is also quite seductive looking, the muted lights have a rather sensual aura about them.
I was told that those shapes are called Neules, and are a Mallorcan Christmas tradition: http://mallorcaphotoblog.com/2008/12/24/a-mallorcan-christmas-tradition-neules/