Unna Saiva is a Sámi offering site situated in Gällivare in Northern Sweden. The site was excavated in the early 20th century. It yielded a large number of finds, including objects of silver, pewter and other metals, coins, and animal bones. The metal objects and coins date mainly to the late 10th century and 11th century AD, whereas the animal bone finds date from the 6th to the 17th centuries AD. Zooarchaeological analysis, radiocarbon datings of animal bones and stable isotope analyses conducted in this study reveal new information about religious ritual, religious change, and human–animal relationships among the Sámi. We argue that there was a change in the offering tradition, intertwining with changes in the subsistence economy and especially reindeer domestication. Our results indicate that reindeer domestication, acknowledged to have had a major impact on social organization and economy, was also a major factor in the transformation of Sámi indigenous religion. However, the underlying nature of the offering tradition remained consistent although the focal species of economic and religious interest changed.

In this study, we used stable isotope analysis and radiocarbon dating to study diet, mobility and chronology in two late medieval/historical coastal populations in northern Norway. We have shown that the individuals buried at Kirkegardsoya date between 1331 and 1953 cal AD and had a homogenous marine diet, whereas the individuals buried at Gullholmen had a more heterogeneous diet, consisting of both terrestrial and marine proteins and date between 1661 and 1953 cal AD. We have demonstrated that reindeer protein was not an important part of their diet, and also discussed the importance of correcting for the marine reservoir effect in populations with a coastal subsistence. Our interpretation is that individuals buried at Kirkegardsoya primarily belonged to a Coastal Sami community, although Norwegians with a similar diet (and likely comprising a minor population in the area) cannot be ruled out. The more varied diet and mobility at Gullholmen could, as predicted, indicate that these individuals may have had a more diverse cultural affinity.

Human burials from the cemetery at the Rounala church, northern Sweden, were radiocarbon (C-14) dated to shed light on the use of the cemetery. Carbon, nitrogen and sulfur stable isotope analysis of bone collagen from 19 distinct individuals indicated that these individuals had a mixed diet consisting of freshwater, marine and terrestrial resources. Dietary modeling using FRUITS was employed to calculate the contributions of the different resources for each individual. These data were then used to calculate individual Delta R values, taking into account freshwater and multiple marine reservoir effects, the latter caused by Baltic and Atlantic marine dietary inputs, respectively. C-14 dating of tissues from modern freshwater fish species demonstrate a lack of a freshwater reservoir effect in the area. Two OxCal models were used to provide endpoint age estimates. The calibrated data suggest that the site's cemetery was most likely in use already from the 14th century, and perhaps until at least the late 18th century.

The silver mine of Nasafjäll and the smeltery site in Silbojokk in Swedish Sápmi were established in 1635 and was used during several phases until the late 19th century. Excavations in Silbojokk, c. 40 km from Nasafjäll have revealed buildings, such as a smeltery, living houses, a bakery, a church with a churchyard. Already at the start, both local and non-local individuals worked at the mine and the smel-tery. Non-locals were recruited to work in the mine and at the smel-tery, and the local Sámi population was recruited to transport the sil-ver down to the Swedish coast. Females, males and children of differ-ent ages were represented among the individuals buried at the church-yard in Silbojokk, used between c. 1635 and 1770. Here we study diet, mobility and exposure to lead in the smeltery workers, the miners and the local population. By employing isotopic analysis, δ13C, δ15N, δ34S, 87/86Sr and elemental composition, we have demonstrated that individ-uals in Silbojokk had a homogenous diet, except for two individuals. In addition, there were local and non-local individuals, and all of them were exposed to lead, that in some cases could have caused death. The environment at Nasafjäll and Silbojokk is still highly toxic.

Vivallen is a Late Iron Age/Early Middle Ages South Saami site with a burial ground as well as a large dwelling site in Härjedalen, Sweden, located in the borderland between Saami and Norse groups. As food can be used as an indicator of cultural affiliation, we investigated the relative importance of various foodstuffs at this site, performing δ13C and δ15N analysis of human and faunal skeletal remains. The site was located along the St Olaf pilgrimage route, implying that some of the buried individuals may not have been local to the site, and therefore we performed δ34S analysis to study mobility. We set out to investigate if there were any changes in diet and mobility over the lifespan of the people buried at Vivallen. The results showed that freshwater fish were an important part of the diet, whereas reindeer and big game do not seem to have been major protein sources. We could not identify any substantial changes in diet in the individuals over time. Our results further demonstrated low mobility among the individuals, with one exception, a female who evidently grew up somewhere else.

A strong cultural connection exists between reindeer and modern Sámi identityand economy. Reindeer domestication is, however, a rather late event, andthere are many Sámi who live off resources other than reindeer herding. Theuse of stable isotope analysis on historic reindeer from different geographicareas can contribute to analysing both the processes involved in reindeer domesticationand different environmental utilization by the Sámi. In this study,reindeer bones from six different sites in northern Sweden, ranging in datefrom the 11th to the 20th century, were analysed for stable isotopes to studyhow reindeer have been utilized in various historic contexts – settlements,offering sites and a marketplace. The stable isotope analysis demonstrateddifferent practices in utilization of reindeer, such as foddering. Foddering issuggested to have caused the elevated δ15N values found in reindeer at theoffering sites Vindelgransele and Unna Saiva, as well as at the settlementVivallen. The analysis further indicates that the offering sites were used bysingle Sámi groups. An important outcome of our study is that the biologyof reindeer in Sápmi was culturally influenced by the Sámi even before thereindeer was domesticated.