by lines. As the negative space between the lines has a distinctive shape, the sayagata pattern is sometimes called the key fret motif in English. Caucasus In Armenia the swastika is called the "arevakhach" and "kerkhach" () and is the ancient symbol of eternity and eternal light (i.e. God). Swastikas in Armenia were found on petroglyphs from the copper age, predating the Bronze Age. During the Bronze Age it was depicted on cauldrons, belts, medallions and other items. Among the oldest petroglyphs is the seventh letter of the Armenian alphabet: Է("E" which means "is" or "to be") depicted as a half-swastika. Swastikas can also be seen on early Medieval churches and fortresses, including the principal tower in Armenia's historical capital city of Ani. The same symbol can be found on Armenian carpets, cross-stones (khachkar) and in medieval manuscripts, as well as on modern monuments as a symbol of eternity. Old petroglyphs of four-beam and other swastikas were recorded in Dagestan, in particular, among the Avars. According to Vakhushti of Kartli, the tribal banner of the Avar khans depicted a wolf with a standard with a double-spiral swastika. Petroglyphs with swastikas were depicted on medieval Vainakh tower architecture (see sketches by scholar Bruno Plaetschke from the 1920s). Thus, a rectangular swastika was made in engraved form on the entrance of a residential tower in the settlement Khimoy, Chechnya. Northern Europe Germanic Iron Age The swastika shape (also called a fylfot) appears on various Germanic Migration Period and Viking Age artifacts, such as the 3rd-century Værløse Fibula from Zealand, Denmark, the Gothic spearhead from Brest-Litovsk, today in Belarus, the 9th-century Snoldelev Stone from Ramsø, Denmark, and numerous Migration Period bracteates drawn left-facing or right-facing. The pagan Anglo-Saxon ship burial at Sutton Hoo, England, contained numerous items bearing the swastika, now housed in the collection of the Cambridge Museum of Archaeology and Anthropology. The swastika is clearly marked on a hilt and sword belt found at Bifrons in Kent, in a grave of about the 6th century. Hilda Ellis Davidson theorised that the swastika symbol was associated with Thor, possibly representing his Mjolnirsymbolic of thunderand possibly being connected to the Bronze Age sun cross. Davidson cites "many examples" of the swastika symbol from Anglo-Saxon graves of the pagan period, with particular prominence on cremation urns from the cemeteries of East Anglia. Some of the swastikas on the items, on display at the Cambridge