Ceramoplastic Decoration in the Byzantine Fortifications of Thessaloniki: Epigraphs, Monograms, Symbols, and Ornaments

The fortifications of Thessaloniki incorporate a variety of construction materials, among which ceramics play an essential yet understudied role. While often perceived as secondary elements in military architecture, ceramic bricks and decorative motifs contributed significantly to both the structural integrity and aesthetic identity of the city’s walls. These elements, integrated into the masonry, not only enhanced the visual appearance of the fortifications but also carried symbolic and functional meanings. This paper investigates the nature and function of architectural ceramics in Thessaloniki’s fortifications, aiming to clarify their purpose and significance within the broader context of Byzantine defensive architecture. Our primary objective is to systematically classify the ceramic materials used in the walls, including bricks, decorative elements, and ornamental patterns. A key focus is to determine whether the use of ceramics was primarily a structural necessity, a stylistic choice, or a combination of both. Additionally, the study examines how these materials compare to similar features in other Byzantine fortifications, shedding light on regional variations, construction techniques, and external influences. Particular attention is given to ceramoplastic decoration, categorized into four groups: decorative motifs, which enrich the visual impact of the walls; apotropaic symbols, believed to ward off evil; epigraphic elements, including inscriptions with historical or religious messages; and monograms, associated with identity, patronage, or imperial affiliations. Methodologically, this research is based on field documentation, involving detailed observation, photographic recording, and analysis of ceramic elements in situ, combined with archival research on historical construction practices. Comparative analysis with other Byzantine fortifications provides a broader architectural and material culture framework. By addressing these objectives, this paper reassesses the role of ceramics in Byzantine fortifications, arguing for their significance beyond mere structural components. The findings contribute to the study of Byzantine military architecture, emphasizing the intersection of construction, aesthetics, and symbolism in medieval Thessaloniki.