They survived in the wild in Europe till late in the Roman Empire and in 1847 were believed to be occasionally captured and exhibited in shows ("venationes") in Roman amphitheatres such as the colosseum. Aurochs horns were often used by Romans as hunting horns. Julius Caesar described aurochs in Gaul:  The Hebrew Bible contains numerous references to the untameable strength of the "re'em", translated as "bullock" or "wild-ox" in Jewish translations and translated rather poorly in the King James Version as "unicorn", but recognized from the last century by Hebrew scholars as the aurochs. When the aurochs became rarer, hunting it became a privilege of the nobility and a sign of a high social status. The "Nibelungenlied" describes Siegfried killing aurochs: ""Dar nâch sluoc er schiere einen wisent und einen elch / starker ûwer viere und einen grimmen schelch"" (Nibelungenlied 937.1-2), meaning "After that, he quickly defeated one wisent and one elk, four strong aurochs, and one terrible schelch." Aurochs horns were commonly used as drinking horns by the nobility, which led to the fact that many aurochs horn sheaths are preserved today (albeit often discoloured). The drinking horn at Corpus Christi College, Cambridge, given to the college on its foundation in 1352, probably by the college's founders, the Guilds of Corpus Christi and the Blessed Virgin Mary, is thought to come from an aurochs. A painting by Willem Kalf depicts an aurochs horn. The horns of the last aurochs bulls, which died in 1620, were ornamented with gold and are located at the Livrustkammaren in Stockholm today. Schneeberger writes that aurochs were hunted with arrows, nets, and hunting dogs. With the aurochs immobilized, the curly hair on the forehead was cut from the living animal. Belts were made out of this hair and were believed to increase the fertility of women. When the aurochs was slaughtered, a cross-like bone ("os cardis") was extracted from the heart. This bone, which is also present in domesticated cattle, contributed to the mystique of the animal and magical powers have been attributed to it.