The rule has existed since the 1830s. Retail markets have existed since ancient times. Bodhidharma as a historical person may even never have actually existed. Historians disagree about whether they existed or not. Technical drawing has existed since ancient times. Conspiracists see this as evidence that they never existed. Other traditions existed alongside this one, however. Various games have existed in Algeria since antiquity. Others had existed earlier, but lost their privileges. Minorities of each creed existed almost everywhere, however. However, no municipality yet existed. But the painting likely never existed. In Sweden, there never existed outright serfdom. Coin collecting may have possibly existed in ancient times. However, a real threat existed and was recognized.