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"Mannering, Ulla"
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Palaeoproteomics identifies beaver fur in Danish high-status Viking Age burials - direct evidence of fur trade
Fur is known from contemporary written sources to have been a key commodity in the Viking Age. Nevertheless, the fur trade has been notoriously difficult to study archaeologically as fur rarely survives in the archaeological record. In Denmark, fur finds are rare and fur in clothing has been limited to a few reports and not recorded systematically. We were therefore given access to fur from six Danish high status graves dated to the Viking Age. The fur was analysed by aDNA and palaeoproteomics methods to identify the species of origin in order to explore the Viking Age fur trade. Endogenous aDNA was not recovered, but fur proteins (keratins) were analysed by MALDI-TOF-MS and LC-MS/MS. We show that Viking Age skin clothing were often composites of several species, showing highly developed manufacturing and material knowledge. For example, fur was produced from wild animals while leather was made of domesticates. Several examples of beaver fur were identified, a species which is not native to Denmark, and therefore indicative of trade. We argue that beaver fur was a luxury commodity, limited to the elite and worn as an easily recognisable indicator of social status.
Journal Article
Species Identification of Archaeological Skin Objects from Danish Bogs: Comparison between Mass Spectrometry-Based Peptide Sequencing and Microscopy-Based Methods
Denmark has an extraordinarily large and well-preserved collection of archaeological skin garments found in peat bogs, dated to approximately 920 BC - AD 775. These objects provide not only the possibility to study prehistoric skin costume and technologies, but also to investigate the animal species used for the production of skin garments. Until recently, species identification of archaeological skin was primarily performed by light and scanning electron microscopy or the analysis of ancient DNA. However, the efficacy of these methods can be limited due to the harsh, mostly acidic environment of peat bogs leading to morphological and molecular degradation within the samples. We compared species assignment results of twelve archaeological skin samples from Danish bogs using Mass Spectrometry (MS)-based peptide sequencing, against results obtained using light and scanning electron microscopy. While it was difficult to obtain reliable results using microscopy, MS enabled the identification of several species-diagnostic peptides, mostly from collagen and keratins, allowing confident species discrimination even among taxonomically close organisms, such as sheep and goat. Unlike previous MS-based methods, mostly relying on peptide fingerprinting, the shotgun sequencing approach we describe aims to identify the complete extracted ancient proteome, without preselected specific targets. As an example, we report the identification, in one of the samples, of two peptides uniquely assigned to bovine foetal haemoglobin, indicating the production of skin from a calf slaughtered within the first months of its life. We conclude that MS-based peptide sequencing is a reliable method for species identification of samples from bogs. The mass spectrometry proteomics data were deposited in the ProteomeXchange Consortium with the dataset identifier PXD001029.
Journal Article
Into the fire: Investigating the introduction of cremation to Nordic Bronze Age Denmark: A comparative study between different regions applying strontium isotope analyses and archaeological methods
Changes in funerary practices are key to the understanding of social transformations of past societies. Over the course of the Nordic Bronze Age, funerary practices changed from inhumation to cremation. The aim of this study is to shed light on this fundamental change through a cross-examination of archaeometric provenance data and archaeological discussions of the context and layouts of early cremation graves. To this end, we conducted 19 new provenance analyses of strontium isotopes from Early Nordic Bronze age contexts in Thisted County and Zealand and Late Bronze Age contexts from Thisted County and Vesthimmerland (Denmark). These data are subsequently compared with data from other extant relevant studies, including those from Late Bronze Age Fraugde on the Danish island of Fyn. Overall, the variations within our provenience data suggest that the integration and establishment of cremation may not have had a one-to-one relationship with in-migration to Nordic Bronze Age Denmark. Moreover, there seems to be no single blanket scenario which dictated the uptake of cremation as a practice within this part of Southern Scandinavia. By addressing habitus in relation to the deposition of cremations as juxtaposed with these provenance data ¸ we hypothesize several potential pathways for the uptake of cremation as a new cultural practice within the Danish Nordic Bronze Age and suggest that this may have been a highly individual process, whose tempo may have been dictated by the specificities of the region(s) concerned.
Journal Article
Iconic Costumes
This richly illustrated book presents a selection of the rich and varied iconographic material from the Scandinavian Late Iron Age (AD 400-1050) depicting clothed human figures, from an archaeological textile and clothing perspective. The source material consists of five object categories: gold foils, gold bracteates, helmet plaques, jewelry, and textile tapestries and comprises over 1000 different images of male and female costumes which are then systematically examined in conjunction with our present knowledge of archaeological textiles. In particular, the study explores the question of whether the selected images complement the archaeological clothing sources, through a new analytical tool which enables us to compare and contrast the object categories in regard to material, function, chronology, context and interpretation. The tool is used to record and analyze the numerous details of the iconographic costumes, and to facilitate a clear and easy description. This deliberate use of explicit costume shapes enhances our interpretation and understanding of the Late Iron Age clothing tradition. Thus, the majority of the costumes depicted are identified in the Scandinavian archaeological textile record, demonstrating that the depictions are a reliable source of research for both iconographical costume and archaeological clothing. The book contributes with new information on social, regional and chronological differences in clothing traditions from ca. AD 400 to the Viking Age.
eBook
Thermal and tactile properties of nettle, flax and wool cloth
The modern textile industry uses a wide range of natural and artificial materials for clothing. In ancient Europe, only a few materials were locally available: wool and plant fibres such as flax, hemp and nettle. Nettle differs from other plant fibres in that it grows wild and does not need cultivation. It was long believed that after agriculture was established, nettle served only as an inferior substitute. However, a 2800-year-old textile from Lusehøj in Denmark shows that nettle was deliberately chosen in an agricultural society to produce high-quality textiles. Why this choice was made remains unclear. One possibility is that nettle has different properties from other fibres. This study investigates the thermal resistance of modern nettle, flax, and wool cloths made by hand. Results show nettle is similar to flax, while wool has a higher thermal capacity. A tactile test also found nettle and flax difficult to distinguish.
Journal Article
Tracing the dynamic life story of a Bronze Age Female
Ancient human mobility at the individual level is conventionally studied by the diverse application of suitable techniques (e.g. aDNA, radiogenic strontium isotopes, as well as oxygen and lead isotopes) to either hard and/or soft tissues. However, the limited preservation of coexisting hard and soft human tissues hampers the possibilities of investigating high-resolution diachronic mobility periods in the life of a single individual. Here, we present the results of a multidisciplinary study of an exceptionally well preserved circa 3.400-year old Danish Bronze Age female find, known as the Egtved Girl. We applied biomolecular, biochemical and geochemical analyses to reconstruct her mobility and diet. We demonstrate that she originated from a place outside present day Denmark (the island of Bornholm excluded) and that she travelled back and forth over large distances during the final months of her life, while consuming a terrestrial diet with intervals of reduced protein intake. We also provide evidence that all her garments were made of non-locally produced wool. Our study advocates the huge potential of combining biomolecular and biogeochemical provenance tracer analyses to hard and soft tissues of a single ancient individual for the reconstruction of high-resolution human mobility.
Journal Article
Iconic Costumes
This richly illustrated book presents a selection of the rich and varied iconographic material from the Scandinavian Late Iron Age (AD 400-1050) depicting clothed human figures, from an archaeological textile and clothing perspective. The source material consists of five object categories: gold foils, gold bracteates, helmet plaques, jewelry, and textile tapestries and comprises over 1000 different images of male and female costumes which are then systematically examined in conjunction with our present knowledge of archaeological textiles. In particular, the study explores the question of whether the selected images complement the archaeological clothing sources, through a new analytical tool which enables us to compare and contrast the object categories in regard to material, function, chronology, context and interpretation. The tool is used to record and analyze the numerous details of the iconographic costumes, and to facilitate a clear and easy description. This deliberate use of explicit costume shapes enhances our interpretation and understanding of the Late Iron Age clothing tradition. Thus, the majority of the costumes depicted are identified in the Scandinavian archaeological textile record, demonstrating that the depictions are a reliable source of research for both iconographical costume and archaeological clothing. The book contributes with new information on social, regional and chronological differences in clothing traditions from ca. AD 400 to the Viking Age.
eBook
Characterising the potential of sheep wool for ancient DNA analyses
The use of wool derived from sheep (
Ovis aries
) hair shafts is widespread in ancient and historic textiles. Given that hair can represent a valuable source of ancient DNA, wool may represent a valuable genetic archive for studies on the domestication of the sheep. However, both the quality and content of DNA in hair shafts are known to vary, and it is possible that common treatments of wool such as dyeing may negatively impact the DNA. Using quantitative real-time polymerase chain reaction (PCR), we demonstrate that in general, short fragments of both mitochondrial and single-copy nuclear DNA can be PCR-amplified from wool derived from a variety of breeds, regardless of the body location or natural pigmentation. Furthermore, although DNA can be PCR-amplified from wool dyed with one of four common plant dyes (tansy, woad, madder, weld), the use of mordants such as alum or iron leads to considerable DNA degradation. Lastly, we demonstrate that mtDNA at least can be PCR-amplified, cloned and sequenced from a range of archaeological and historic Danish, Flemmish and Greenlandic wool textile samples. In summary, our data suggest that wool offers a promising source for future ancient mitochondrial DNA studies.
Journal Article
Bronze Age wool: provenance and dye investigations of Danish textiles
Recent analysis of the wool textiles from the famous Egtved oak coffin burial in Denmark indicated that the wool had been obtained from beyond Denmark. Was this an isolated case or evidence of a large-scale wool trade in the Danish Bronze Age? To investigate the broader pattern of wool provenance, textile manufacturing and trade practices, strontium isotope and organic dye analyses were conducted on textiles from a variety of selected burial contexts. Strontium isotope analysis revealed that at least 75 per cent of the Bronze Age wool samples originated outside present-day Denmark. Results also showed no evidence for the use of organic dyes, thereby supporting the hypothesis that no dyestuffs were used in Nordic Bronze Age textile production. These results challenge extant interpretations of Scandinavian Bronze Age textile provenance, and demonstrate the complexity of exchange networks in wool textiles during this period.
Journal Article