Final answer:
Sainte-Chapelle in Paris showcases the Rayonnant Gothic style, distinguished by its heavy reliance on glass for natural light, as well as by its expressive decoration, such as the elaborate flying buttresses and stained glass windows that characterize Gothic architecture.
Step-by-step explanation:
The architectural style of Sainte-Chapelle in Paris is the Rayonnant Gothic style, which is a particular period within the broader Gothic style of architecture. This style is characterized by a strong emphasis on the use of light and decorative patterns.
Dating back to 1248, Sainte-Chapelle is renowned for its height, slim structures, extensive use of stained glass, and pointed arches - hallmark features of the Gothic architectural movement that emerged in the 12th century.
This movement particularly focused on creating structures that seemed to reach for the heavens, illuminating interiors with vast colorful windows and creating an impression of lightness and verticality.
Indeed, more than three quarters of Sainte-Chapelle's structure is composed of glass, allowing an abundance of light to flood the building, thus highlighting the characteristic luminosity of the Rayonnant style.
The interior is further adorned with imagery, including sculpted apostles, scenes of martyrdom, and angels, which reflect the rich iconography typical of the Gothic era. Moreover, the presence of elaborate flying buttresses and pinnacles on the building's exterior is indicative of this style's decorative flair.