Этому способствует... прежде всего

Этому способствует... прежде всего сама каноничность иконописи, строгая ограниченность сюжетов и композиций, их иконографическая определенность, наличие образцов, по которым из века в век писались те или иные сюжеты.

Результаты (английский) 1:

This is facilitated by ... first and foremost, the canonicity of itself painting a strict limited subjects and compositions, their iconographic certainty the existence of samples on which for centuries were those or other subjects.

Результаты (английский) 2:

It is promoted above all ... very canonical iconography strictly limited subjects and compositions, their iconographic certainty, the presence of the samples, which for centuries were written certain scenes.

Результаты (английский) 3:

this contributes to the... the primary каноничность icons, the strict limitations of plots and compositions, their иконографическая certainty, the availability of samples for which ages писались those or other elements.