Grand Space Opera: Light Age / The cathedral

Image made for the Space Opera Artstation challenge.
Context : in a distant future, the human empire quickly realized that most of the habitable planets of the known space were already inhabited by various alien species. Instead of starting endless wars, the clergy iniated projet "iter" (the way").
The idea was to create diplomatical and peaceful relations with these species through a pragmatic use of the wedding.
#02 _ The cathedral
The gigantic mobile church (containing sacred Earth soil) is deployed in a nearby plain, surrounded by its escort and an holographic ring of purity.