Publications
Oriental marbles in Castel del Monte in Andria (Puglia, Italy)
Castel del Monte, a UNESCO World Heritage Site in Andria, Italy, is revealed as a monumental reuse of ancient Mediterranean marbles, primarily from Roman-era spolia. These materials, sourced from nearby archaeological sites like Luceria and Sypontum, were strategically repurposed by medieval rulers—Charles I of Anjou and Frederick II—to convey prestige and imperial symbolism. The study highlights that the preservation and placement of these spoils reflect deliberate functional and symbolic criteria, reinforcing the political and cultural significance of the structure. This approach underscores the continuity of marble reuse across classical to medieval periods, with implications for understanding architectural heritage and material culture in the Mediterranean.
17 zu 7 - Der ideale Grundriss von Castel del Monte und seine Überarbeitung in der frühen Werkplanung
Castel del Monte, a UNESCO World Heritage Site in Apulia, Italy, features a ground plan with three octagonal structures that adhere to the proportions of the golden ratio (1:√φ), leading to irrational measurements. However, practical construction challenges necessitated an adaptation during early planning stages. The study reveals that the design was translated into a modular system based on whole numbers while preserving its original aesthetic intent. The key ratio 17:7 emerged as fundamental in this process, demonstrating how mathematical precision can be reconciled with practical construction demands without compromising artistic vision.
From the Apulia Foreland to the Bradanic Trough: a one-day geological field trip "jumping" from Cretaceous to Pleistocene in the Murge area (Puglia, southern Italy)
A one-day geological field trip in the Murge area of Puglia, southern Italy, reveals the dynamic interplay between tectonics and sedimentation across a temporal span from the Cretaceous to Pleistocene. The study highlights the stratigraphic architecture of peritidal facies associations in the Upper Cretaceous section at Cava Pontrelli, one of the world's largest dinosaur footprint sites, followed by an analysis of shallow-marine carbonate deposits influenced by syn-sedimentary tectonics during the Pliocene-Pleistocene. A key finding is the identification of a Gilbert-type delta facies association in the Calcarenite di Gravina Formation, formed at the base of an ancient fault plane that marks the structural transition between the Apulia foreland and the Bradanic Trough foredeep. The trip also illustrates the historical use of local stones in the UNESCO World Heritage Site of Castel del Monte, underscoring its geological significance.
Efficient Point Cloud Management through an Integrated Cloud-Based Visualization Platform
A novel software, Intelligent Cloud Viewer (ICV), demonstrates unprecedented efficiency in managing and visualizing large-scale point clouds, even on standard computing systems. Developed by AESEI software (a spin-off of Politecnico di Bari), ICV leverages advanced computational techniques, including Open Inventor for graphics, CGAL for geometry, and PCL for point cloud processing, to handle tens of millions of points with optimized rendering. Tested on photogrammetric and TLS data, the platform excels in tasks such as georeferencing, matching, decimation, and distance calculations. Its application at Castel del Monte showcased rapid data acquisition—800 photos in 15 minutes—with high coverage, validating its potential for large-scale heritage surveys.
La pianta di Castel del Monte e la sezione argentea
Castel del Monte, a UNESCO World Heritage Site in Puglia, Italy, features a unique architectural design of three regular octagons that may be intricately linked to the silver section (a mathematical ratio akin to the golden ratio). This study reveals that the building's plan likely employed advanced computational methods, reflecting the sophisticated mathematical knowledge prevalent at Emperor Frederick II's court during its construction (around/after 1240). The research challenges prior explanations relying solely on simple geometry by demonstrating how the octagons' relationships and construction precision suggest a more complex, mathematically driven design process. This insight redefines Castel del Monte as a testament to the high level of mathematical expertise in medieval Europe.
Paesaggi di Puglia e ’patrimonio UNESCO’: da Castel del Monte alla viae Appia e Traiana Passato, presente e… ritorno al futuro!
A new study reveals the significant morphogenetic capacity of medieval landscapes in central Puglia, Italy, with Castel del Monte—a UNESCO World Heritage Site since 1996—as its focal point. The research highlights how a robust ancient road network, rooted in the Appian and Trajan's Ways, has shaped historical settlements and fortifications across southeastern Italy. These routes, representing the first 'highway' system in Euro-Mediterranean history, demonstrate remarkable engineering resilience and cultural endurance, underpinning their potential nomination for UNESCO World Heritage recognition in 2024. The study employs a comprehensive analysis of settlement density, urban-rural fortification systems, and historical road infrastructure to elucidate this dynamic interplay between landscape evolution and heritage preservation.
L’impiego della breccia rosata nei cantieri federiciani: scelta estetica o politica?
The use of pink breccia from Gargano (Apulia) in monuments commissioned by Frederick II was not merely an aesthetic choice but carried significant ideological weight, symbolizing a deliberate reference to porphyry. This material, with petrological similarities to coral breccia, was sourced from western Gargano and employed in architectural elements of Castel del Monte and other sites linked to the 'school of Foggia.' Its reintroduction in Capitanata after a Late Antique hiatus marked a Gothic stylistic shift among skilled workers serving the emperor. The study traces its use across key buildings—from Foggia to Castel del Monte, including Pantano, San Severo, Lucera, and Lagopesole—as a manifestation of Frederick II's mature aesthetics. The ideological significance is further underscored by its presence in his tomb in Foggia's cathedral, containing his entrails.
The role of the ‘silver ratio’ in the geometry of Castel del Monte
Research reveals that the geometry of Castel del Monte can be harmoniously constructed using solely the silver ratio, eliminating slight discrepancies observed when both the golden and silver ratios are applied. This study challenges traditional assumptions about the influence of historical octagonal plans on Frederick II's design choices by focusing on the silver ratio's role in creating balanced proportions within the castle's structure. The analysis employs geometric relationships to propose an idealized plan that maintains aesthetic harmony, offering new insights into the mathematical principles underlying medieval architectural innovation.
Xylella fastidiosa and the Olive Oil Crisis in Puglia
Xylella fastidiosa, a bacterium transmitted by spittlebugs, poses a severe threat to Puglia's historic olive groves and its olive oil industry. The study highlights the potential for large-scale replacement of vulnerable cultivars with resistant ones or abandonment of olive cultivation in affected areas, marking a significant economic shift for the region. Through extensive fieldwork conducted in spring 2019, including interviews with olive growers and producers, the research captures the emotional and practical responses to this crisis—ranging from optimism to desperation—as well as the broader implications for Puglia's agricultural landscape and economy.
Razionalità e mistero a Castel del Monte
Castel del Monte, the enigmatic fortress commissioned by Emperor Frederick II of Swabia, embodies rational beauty through its perfect forms and mathematical precision. The structure's design, rooted in concepts like the golden ratio, reflects a deliberate harmony of form, number, and naturalistic detail, symbolizing imperial perfection. While the building's myriad interpretations remain speculative, its aesthetic and symbolic significance stand as a testament to the intersection of art, mathematics, and political power. This study underscores Castel del Monte’s role as a masterful fusion of rationality and mystery, where every element serves both functional and symbolic purposes.
Wulf Schirmer: Castel del Monte
Castel del Monte has been the subject of significant architectural and historical research, as documented in Wulf Schirmer's study. The book presents groundbreaking findings from research conducted between 1990 and 1996, focusing on the site's archaeological and architectural history. Schirmer, along with a team of collaborators including Günter Hell, Dorothee Sack, Werner Schnuchel, Christoph Uricher, and Wolfgang Zick, employed a multidisciplinary approach to analyze Castel del Monte. The study incorporates photographs by Rafael Cardenas-Dopf, providing visual documentation that complements the textual analysis. Key insights include the reconstruction of the site's historical layers and an in-depth examination of its unique architectural features, contributing significantly to the understanding of its cultural significance.
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