churches or temples, or cross running water. Although not traditionally regarded as an apotropaic, mirrors have been used to ward off vampires when placed, facing outwards, on a door (in some cultures, vampires do not have a reflection and sometimes do not cast a shadow, perhaps as a manifestation of the vampire's lack of a soul). This attribute is not universal (the Greek vrykolakas/tympanios was capable of both reflection and shadow), but was used by Bram Stoker in Dracula and has remained popular with subsequent authors and filmmakers. Some traditions also hold that a vampire cannot enter a house unless invited by the owner; after the first invitation they can come and go as they please. Though folkloric vampires were believed to be more active at night, they were not generally considered vulnerable to sunlight. Reports in 1693 and 1694 concerning citings of vampires in Poland and Russia claimed that when a vampire's grave was recognized, eating bread baked with its blood mixed into the flour, or simply drinking it, granted the possibility of protection. Other stories (primarily the Arnold Paole case) claimed the eating of dirt from the vampire's grave would have the same effect. Methods of destruction Methods of destroying suspected vampires varied, with staking the most commonly cited method, particularly in South Slavic cultures. Ash was the preferred wood in Russia and the Baltic states, or hawthorn in Serbia, with a record of oak in Silesia. Aspen was also used for stakes, as it was believed that Christ's cross was made from aspen (aspen branches on the graves of purported vampires were also believed to prevent their risings at night). Potential vampires were most often staked through the heart, though the mouth was targeted in Russia and northern Germany and the stomach in north-eastern Serbia. Piercing the skin of the chest was a way of "deflating" the bloated vampire. This is similar to a practice of "anti-vampire burial": burying sharp objects, such as sickles, with the corpse, so that they may penetrate the skin if the body bloats sufficiently while transforming into a revenant. Decapitation was the preferred method in German and western Slavic areas, with the head buried between the feet, behind the buttocks or away from the body. This act was seen as a way of hastening the departure of the soul, which in some cultures was said to linger in the corpse. The vampire's