1) Medieval weapon 
A pernach (перна́ч, пірна́ч, piernacz) is a type of flanged mace originating in the 12th century in the region of Kievan Rus` and later widely used throughout Europe. The name comes from the Slavic word перо (pero) meaning feather, referring to a type of pernach resembling an arrow with feathering. Among a variety of similar wea....