Three hares
The three hares (or three rabbits) is a circular motif or meme appearing in sacred sites from East Asia, the Middle East and to the churches of Devon, England (as the "Tinners' Rabbits"), and historical synagogues in Europe. It is used as an architectural ornament, a religious symbol, and in other modern works of art or a logo for adornment (including tattoos), jewelry, and a coat of arms on an escutcheon. It is viewed as a puzzle, a topology problem or a visual challenge, and has been rendered as sculpture, drawing, and painting. The symbol features three hares  or rabbits chasing each other in a circle. Like the triskelion, the triquetra, and their antecedents (e.g., the triple spiral), the symbol of the three hares has a threefold rotational symmetry. Each of the ears is shared by two hares, so that only three ears are shown. Although its meaning is apparently not explained in contemporary written sources from any of the medieval cultures where it is found, it is thought to have a range of symbolic or mystical associations with fertility and the lunar cycle. When used in Christian churches, it is presumed to be a symbol of the  Trinity. Its origins and original significance are uncertain, as are the reasons why it appears in such diverse locations. Origins in Buddhism and diffusion on the Silk Road. The earliest occurrences appear to be in cave temples in China, dated to the Sui dynasty (6th to 7th centuries). The iconography spread along the Silk Road, and was a symbol associated with Buddhism. In other contexts the metaphor has been given different meaning. For example, Guan Youhui, a retired researcher from the Dunhuang Academy, who spent 50 years studying the decorative patterns in the Mogao Caves, believes the three rabbits—"like many  images in Chinese folk art that carry auspicious symbolism—represent peace and tranquility". "See" Aurel Stein. The hares have appeared in Lotus motifs. The three hares appear on 13th century Mongol metalwork, and on a copper coin, found in Iran, dated to 1281. Another appears on an ancient Islamic-made reliquary from southern Russia. Another 13th or early 14th century box, later used as a reliquary, was made in Iran under Mongol rule, and is preserved in the treasury of the Cathedral of Trier in Germany. On its base, the casket has Islamic designs, and originally featured two images of  the three hares. One was lost through damage. One theory pertaining to the spread of the motif is that it was transported from China across Asia and as far as the south west of England by merchants travelling the silk road and that the motif was transported via designs found on expensive Oriental ceramics. This view is supported by the early date of the surviving occurrences in China. However, the majority of representations of the three hares in churches occur in England and northern Germany. This supports a contrary view that the three hares occurred independently as English or early  German symbols. Some claim that the Devon name, Tinners' Rabbits, is related to local tin miners adopting it. The mines generated wealth in the region and funded the building and repair of many local churches, and thus the symbol may have been used as a sign of the miners' patronage. The architectural ornament of the three hares also occurs in churches that are unrelated to the miners of South West England. Other occurrences in England include floor tiles at Chester Cathedral, stained glass at Long Melford, Suffolk and a ceiling in Scarborough, Yorkshire. In Western Europe. The motif of the  three hares is used in a number of medieval or more recent European churches, particularly in France ("e.g.", in the Basilica of Notre-Dame de Fourvière in Lyon) and Germany. It occurs with the greatest frequency in the churches of Devon, England, where it appears to be a recollection of earlier Insular Celtic design such as the triaxially symmetric triskele and other Romano-British designs which are known from early British 'Celtic' (La Tène) metalwork such as circular enamelled and openwork triskel brooches (fibulae). The motif appears in illuminated manuscripts amongst similar devices such as the anthropomorphic "beard pullers" seen  in manuscripts such as the Book of Kells, architectural wood carving, stone carving, window tracery and stained glass. In South Western England there are over thirty recorded examples of the three hares appearing on 'roof bosses' (carved wooden knobs) on the ceilings in medieval churches in Devon, (particularly Dartmoor). There is a good example of a roof boss of the three hares at Widecombe-in-the-Moor, Dartmoor, with another in the town of Tavistock on the edge of the moor. The motif occurs with similar central placement in Synagogues. Another occurrence is on the ossuary that by tradition contained  the bones of St. Lazarus. Where it occurs in England, the three hares motif usually appears in a prominent place in the church, such as the central rib of the chancel roof, or on a central rib of the nave. This suggests that the symbol held significance to the church, and casts doubt on the theory that they may have been a masons' or carpenters' signature marks. There are two possible and perhaps concurrent reasons why the three hares may have found popularity as a symbol within the church. Firstly, it was widely believed that the hare was hermaphrodite and  could reproduce without loss of virginity. This led to an association with the Virgin Mary, with hares sometimes occurring in illuminated manuscripts and Northern European paintings of the Virgin and Christ Child. The other Christian association may have been with the Holy Trinity, representing the ""One in Three and Three in One"" of which the triangle or three interlocking shapes such as rings are common symbols. In many locations the three hares are positioned adjacent to the Green Man, a symbol commonly believed to be associated with the continuance of Anglo-Saxon or Celtic paganism. These juxtapositions may have been  created to imply the contrast of the Divine with man's sinful, earthly nature. In Judaism. In Judaism, the "shafan" in Hebrew has symbolic meaning. Although rabbits are listed as a non-kosher animal in the Biblethey at least arguably chew their cud lacking cloven hoovesrabbits can carry very positive symbolic connotations, like lions and eagles. 16th century German scholar Rabbi Yosef Hayim Yerushalmi, saw the rabbits as a symbol of the Jewish diaspora. The replica of the Chodorow Synagogue from Poland (on display at the Museum of the Jewish Diaspora in Tel Aviv) has a ceiling with a large  central painting which depicts a double-headed eagle holds two brown rabbits in its claws without harming them. The painting is surrounded by a citation from the end of Deuteronomy: This may be translated: "As an eagle that stirreth up her nest, hovereth over her young, spreadeth abroad her wings, taketh them, beareth them on her pinions (...thus is God to the Jewish people)." The hare frequently appears in the form of the symbol of the "rotating rabbits". An ancient German riddle describes this graphic thus: This curious graphic riddle can be found in all of the famous wooden synagogues  from the period of the 17th and 18th century in the Ashknaz region (in Germany) that are on museum display in Beth Hatefutsoth Museum in Tel Aviv, the Jewish Museum Berlin and The Israel Museum in Jerusalem. They also appear in the Synagogue from Horb am Neckar (donated to the Israel Museum). The three animals adorn the wooden panels of the prayer room from Unterlimpurg near Schwäbisch Hall, which may be seen in replica in the Jewish Museum Berlin. They also are seen in a main exhibit of the Diaspora Museum in Tel Aviv. Israeli art historian Ida Uberman wrote  about this house of worship: "... Here we find depictions of three kinds of animals, all organized in circles: eagles, fishes and hares. These three represent the Kabbalistic elements of the world: earth, water and fire/heavens... The fact that they are always three is important, for that number . . . is important in the Kabbalistic context". Not only do they appear among floral and animal ornaments, but they are often in a distinguished location, directly above the Torah ark, the place where the holy scriptures repose. They appear on headstones in Sataniv (Сатанів), Khmelnytsky Oblast, western Ukraine. As an optical illusion or  puzzle. The logo presents a problem in topology. It is a strange loop rendered as a puzzle. Jurgis Baltrusaitis's 1955 "Le Moyen-Âge fantastique. Antiquités et exotismes dans l'art gothique" includes a 1576 Dutch engraving with the puzzle given in Dutch and French around the image. This is the oldest known dated example of the motif as a puzzle, with a caption that translates as: One recent philosophical book poses it as a problem in perception and an optical illusion—an example of contour rivalry. Each rabbit can be individually seen as correct—it is only when you try  to see all three at once that you see the problem with defining the hares' ears. This is similar to "The Impossible Tribar" by Roger Penrose, originated by Oscar Reutersvärd. Compare M.C. Escher's impossible object.