tribes. The beliefs are closely connected to the land, animism, and the supernatural. Sámi spirituality is often characterized by pantheism, a strong emphasis on the importance of personal spirituality and its interconnectivity with one's own daily life, and a deep connection between the natural and spiritual "worlds". Among other roles, the Noaidi, or Sámi shaman, enables ritual communication with the supernatural through the use of tools such as drums, Joik, Fadno, chants, sacred objects, and fly agaric. Some practices within the Sámi religion include natural sacred sites such as mountains, springs, land formations, Sieidi, as well as man-made ones such as petroglyphs and labyrinths. Sámi cosmology divides the universe into three worlds. The upper world is related to the South, warmth, life, and the color white. It is also the dwelling of the gods. The middle world is like the Norse Midgard, it is the dwelling of humans and it is associated with the color red. The third world is the underworld and it is associated with the color black, it represents the north, the cold and it is inhabited by otters, loons, and seals and mythical animals. Sámi religion shares some elements with Norse mythology, possibly from early contacts with trading Vikings (or vice versa). They were the last worshippers of Thor, as late as the 18th century according to contemporary ethnographers. Through a mainly French initiative from Joseph Paul Gaimard as part of his La Recherche Expedition, Lars Levi Læstadius began research on Sámi mythology. His work resulted in Fragments of Lappish Mythology, since by his own admission, they contained only a small percentage of what had existed. The fragments were termed Theory of Gods, Theory of Sacrifice, Theory of Prophecy, or short reports about rumorous Sami magic and Sami sagas. Generally, he claims to have filtered out the Norse influence and derived common elements between the South, North, and Eastern Sámi groups. The mythology has common elements with other indigenous religions as well—such as those of indigenous peoples in Siberia and North America. Christian mission The term Sámi religion usually refers to the traditional religion, practiced by most Sámi until approximately the 18th century. Christianity was introduced by Roman Catholic missionaries as early as the 13th century. Increased pressure came after the Protestant Reformation, and rune drums were burned or sent to museums abroad. In this period, many Sámi practiced their traditional religion at home, while going