Answer:
Decorative plans of their building projects.
Step-by-step explanation:
In Christianity during the Middle Ages, religious structures were seen as Cathedral, churches, and monasteries. Constructed in enormous building structure with decorative in wall including pillars, glasses, and architectural designs like arches, vaults, etc.
In the Muslim religion, the structural and decorative included in mosques with domes and ornamental. Calligraphy and infinity designs. Geometric Designs used in decorating from vases to architecture, and carpets. Patterns are created from four shapes: squares, polygons, circles, and stars.