Vampires are mythical beings who subsist by feeding on the life essence (generally in the form of blood) of living creatures. In folkloric tales, undead vampires often visited loved ones and caused mischief or deaths in the neighborhoods they inhabited when they were alive. They wore shrouds and were often described as bloated and of ruddy or dark countenance, markedly different from today's gaunt, pale vampire which dates from the early 1800s. Although vampiric entities have been recorded in most cultures, the term vampire was not popularized until the early 18th century, after an influx of vampire superstition into Western Europe from areas where vampire legends were frequent, such as the Balkans and Eastern Europe, although local variants were also known by different names, such as vrykolakas in Greece and strigoi in Romania. This increased level of vampire superstition in Europe led to what can only be called mass hysteria and in some cases resulted in corpses actually being staked and people being accused of vampirism.