"The photographers are taking pictures at the wedding."
Translation:Fotografene tar bilder i bryllupet.
How what came to be?
If you mean the etymological origin of the preposition på, I'd like to know this, too. It has similarities to Russian по, which makes me wonder if both come from a common Indo-European root.
However, Wiktionary gives its etymology as "From Old Norse upp á, compare English upon." Which doesn't quite go back to Indo-European. :-)