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- Variability of lesions and lesion patterns in possible treponematosis cases: Insights from an archaeological site in Tomar, PortugalPublication . Curto, Ana; Fernandes, Teresa; Relvado, Cláudia; Ferro, Sónia; Lopes, CéliaObjective: This study aims to describe various types of skeletal lesions and lesion patterns observed in five potential cases of treponematosis from the same archaeological site. Material and methods: The study examines five adult skeletons recovered from Santa Maria do Olival, Tomar, Portugal. Macroscopic observations were conducted on all remains, supplemented by relevant radiographic investigations. Results: The analyzed individuals exhibited diverse types of skeletal lesions and distinct patterns of lesion distribution. Radiocarbon dating of two of these skeletons locates them chronologically close to the beginning of the colonial period (15th century). Discussion: The findings indicate considerable variation in the lesions and lesion patterns associated with treponematosis, even within the same archaeological site. The radiocarbon data implies the presence of pre-Columbian treponemal disease or a rapid progression to the tertiary phase of the disease. This study represents the oldest cases of treponematosis in Portugal and the only one with more than one individual affected from the same archaeological site. Considering Portugal's prominent role in the European Age of Exploration, the study underscores the significance of pathogen exchanges between Europeans, South Americans, Africans, and Asians. Future investigations should reassess Iberian osteological collections from this time period, given the historical importance of Portugal and Spain in the intercontinental movements.
- Mobility of populations in the transition from muslim world to portuguese kingdom in the Algarve, South Portugal, 11th-13th centuriesPublication . Maurer, Anne-France; MacRoberts, Rebecca; López-Aceves, Judith Margarita; Ortega-González, Alvaro Felipe; Relvado, Cláudia; Fernandes, Teresa; Curate, Francisco; Teixeira, João; Roca-Rada, Xavier; Llamas, Bastien; Luzia, Isabel; Pires, Alexandra; Simões Dias de Oliveira, Luís Filipe; Garcia, Cristina Alexandra Tété; Barrocas , Cristina; Schöne, Bernd R.; Ribeiro, Sara; Santos, Jose Francisco; Valente, Maria JoãoThis study investigates mobility during the transition from Muslim to Christian rule in the Algarve, southern Portugal (11th–13th centuries), using multi-isotope analysis to understand population dynamics during this complex conquest period. Skeletal remains from two key populations were analysed: the final Muslims buried in Loulé before the Christian conquest (necropolises of Quinta da Boavista and Hospital da Misericórdia) and the earliest Christians buried in Cacela-aVelha following the Order of Santiago’s capture in 1240 (necropolis of Poço Antigo). Contemporary faunal remains from trash pits and storage silos were also examined (Loulé: Oficina do Senhor Carrilho; Cacela: Silo 7 of Largo da Fortaleza). Strontium, oxygen, and sulphur isotope analysis of human and animal remains were combined with plant sampling for environmental baselines. Machine learning algorithms integrated this data with published Iberian Peninsula plant isotope ratios to create updated strontium isoscape maps, enabling probabilistic geographic assignment of non-local individuals. Ancient DNA analysis of selected Muslim individuals provided additional mobility insights. Results reveal strikingly different mobility patterns. Muslim individuals were largely local (~95%) with a few non-local likely from the Maghreb or eastern Spain. Conversely, the Christian population displayed extensive mobility, greater for males than females, with nearly 50% non-local to the Algarve. Potential origins were diverse and included regions along the Guadiana River and N/ NE areas. While Muslims showed no sex-based isotope mobility patterns, paleogenetic analysis suggested patrilocal social structures and highlight the complex genetic landscape of the region. The overall data showcase a colonisation process poorly documented in other sources.
- Shrouded in history: unveiling the ways of life of an early Muslim population in Santarém, Portugal (8th– 10th century AD)Publication . MacRoberts, Rebecca Anne; Liberato, Marco; Roca-Rada, Xavier; Valente, Maria João; Relvado, Cláudia; Fernandes, Teresa Matos; Dias, Cristina Barrocas; Llamas, Bastien; Vilar, Hermínia Vasconcelos; Schöne, Bernd R.; Ribeiro, Sara; Santos, José Francisco; Teixeira, João C.; Maurer, Anne-France; Dario Piombino-MascaliIn around 716 AD, the city of Santare´m, Portugal, was conquered by the Berber and Arab armies that swept the Iberian Peninsula and went on to rule the region until the 12th century. Archaeological excavations in 2007/08 discovered an Islamic necropolis (Avenida 5 de Outubro #2–8) that appears to contain the remains of an early Muslim population in Santare´m (8th– 10th century). In this study, skeletal material from 58 adult individuals was analysed for stable carbon (δ13Ccol; δ13Cap), nitrogen (δ15N) and sulphur (δ34S) isotope ratios in bones, and stable oxygen (δ18O), carbon (δ13Cen) and radiogenic strontium ( 87Sr/86Sr) isotopes in tooth enamel. The results of this study revealed a dietary pattern of predominantly C3-plant and domestic C3-fed herbivore consumption during adulthood (δ13Ccol and δ15N, respectively) but a higher proportion of C4-plant input during childhood (δ13Cen) for some individuals—interpreted as possible childhood consumption of millet porridge, a common practice in North Africa—in those with unorthodox burial types (Groups 1 and 2) that was not practiced in the individuals with canonical burials (Group 3). In this first mobility study of a medieval Muslim population in Portugal, δ18ODW values revealed greater heterogeneity in Groups 1 and 2, consistent with diverse origins, some in more humid regions than Santare´m when compared to regional precipitation δ18O data, contrasting the more homogenous Group 3, consistent with the local precipitation δ18O range. Ancient DNA analysis conducted on three individuals revealed maternal (mtDNA) and paternal (Y-chromosome) lineages compatible with a North African origin for (at least) some of the individuals. Additionally, mobility of females in this population was higher than males, potentially resulting from a patrilocal social system, practiced in Berber and Arab communities. These results serve to offer a more detailed insight into the ancestry and cultural practices of early Muslim populations in Iberia.