Gold Shining in the Darkness of a Double Structure: Basilica of San Vitale, Byzantine, Before 526–540
1. What is Byzantine Architecture?
Byzantine architecture is an architectural style that flourished from the 4th to the 15th century, centered on the Eastern Roman Empire. It is an architectural culture that inherited the structural techniques of ancient Rome while developing Christian symbolism and unique spatial expressions. Its scope was vast, and it reached its golden age particularly during the reign of Emperor Justinian (527–565). Representative works include the Basilica of San Vitale and the Hagia Sophia.
The core of Byzantine architecture lies in the development of centralized plans and dome structures. To place a dome over a circular or polygonal centripetal space, techniques such as squinches and pendentives were created, providing an innovative solution to the challenge of placing a round canopy over a square space.
*Image: https://blog.kaarwan.com/squinches-and-pendentives-in-architecture-8359cf6b8825
Furthermore, Byzantine architecture is also important for its attempt at the integration of the basilica and centralized forms. The Hagia Sophia layered a massive dome over a long basilica space, simultaneously achieving public character and symbolism. This integration also influenced later Islamic architecture and was inherited by Sinan's mosque architecture.
◆ Basilica Form
Basilica of Sant'Apollinare Nuovo, 6th century
Basilica of Sant'Apollinare in Classe, 6th century
Basilica of San Giovanni Evangelista, Early Christian period (later rebuilt)
◆ Centralized Form
Basilica of San Vitale (Ravenna), before 526–540
Mausoleum of Galla Placidia, first half of the 5th century
Neonian Baptistery (Ravenna), 5th century
Palatine Chapel of Aachen, 796–804
◆ Integration of Basilica + Centralized Form
Hagia Sophia, 532–537
2. Basilica of San Vitale
The Basilica of San Vitale is a masterpiece of early Byzantine architecture built in Ravenna in the first half of the 6th century. It is a building that maximizes religious symbolism through its octagonal centralized plan and the orchestration of light within. It has a complex composition where the outer and inner octagons overlap, with an ambulatory and exedra placed between them. This multi-layered spatial structure manipulates the reflection and diffusion of light, creating a unique sense of mystery inside.
*Image: from Wikipedia
"A unique form of octagonal double structure"
The core of the interior space is the contrast between darkness and golden mosaics. The basilica generally has subdued lighting, and visitors are first enveloped in deep darkness. However, the moment the morning sun shines through the windows behind the apse, the golden mosaics, as described by the phrase,
"emitted light like a flood"
the entire space transforms dramatically. This lighting effect is not accidental; it is intentionally designed through a structure where the double ambulatory and exedra store, refract, and allow light to seep into the center. This is a case that symbolizes how Byzantine architecture emphasized 'decoration as a membrane'.
Furthermore, the Basilica of San Vitale is also important in architectural history.The octagonal centralizedspatial composition had a strong influence on the laterPalatine Chapel of Aachen, and is also evaluated as the budding of verticality in the Western Middle Ages. The composition, in which the central wall pillars omit cornices to emphasize verticality and pull the space under the dome upward in a cylindrical shape, can be called the prototype of Gothic ascension.
Furthermore, mosaics of Emperor Justinian and Empress Theodora are depicted in the chancel, symbolically expressing the political and religious dominance of the Eastern Roman Empire. It is also important evidence showing the historical background of Ravenna becoming a temporary Western base for the Eastern Roman Empire.
*Reference: "Arata Isozaki's Architectural Discussion #04 Basilica of San Vitale, Byzantine, by Arata Isozaki"