of a number of Magdalenian carvings in bone or antler of animals in the art of the Upper Paleolithic, though they are outnumbered by engraved pieces, which are sometimes classified as sculpture. With the beginning of the Mesolithic in Europe figurative sculpture greatly reduced, and remained a less common element in art than relief decoration of practical objects until the Roman period, despite some works such as the Gundestrup cauldron from the European Iron Age and the Bronze Age Trundholm sun chariot. The oldest European cave art dates back 40,800, and can be found in the El Castillo Cave in Spain. Other cave painting sites include Lascaux, Cave of Altamira, Grotte de Cussac, Pech Merle, Cave of Niaux, Chauvet Cave, Font-de-Gaume, Creswell Crags, Nottinghamshire, England, (Cave etchings and bas-reliefs discovered in 2003), Coliboaia cave from Romania (considered the oldest cave painting in central Europe) and Magura, Belogradchik, Bulgaria. Rock painting was also performed on cliff faces, but fewer of those have survived because of erosion. One well-known example is the rock paintings of Astuvansalmi in the Saimaa area of Finland. When Marcelino Sanz de Sautuola first encountered the Magdalenian paintings of the Altamira cave, Cantabria, Spain in 1879, the academics of the time considered them hoaxes. Recent reappraisals and numerous additional discoveries have since demonstrated their authenticity, while at the same time stimulating interest in the artistry of Upper Palaeolithic peoples. Cave paintings, undertaken with only the most rudimentary tools, can also furnish valuable insight into the culture and beliefs of that era. The Rock art of the Iberian Mediterranean Basin represents a very different style, with the human figure the main focus, often seen in large groups, with battles, dancing and hunting all represented, as well as other activities and details such as clothing. The figures are generally rather sketchily depicted in thin paint, with the relationships between the groups of humans and animals more carefully depicted than individual figures. Other less numerous groups of rock art, many engraved rather than painted, show similar characteristics. The Iberian examples are believed to date from a long period perhaps covering the Upper Paleolithic, Mesolithic and early Neolithic. Prehistoric Celtic art comes from much of Iron Age Europe and survives mainly in the form of high-status metalwork skillfully decorated with complex, elegant and mostly abstract designs, often using curving and spiral forms. There are human heads and some fully represented animals, but