▁also ▁used ▁officially ▁in ▁Repub lika ▁Sr ps ka ▁( by ▁Bos n ian ▁Ser bs ) ▁and ▁as ▁the ▁official ▁eth nic ▁Flag ▁of ▁Ser bs ▁of ▁Cro atia . ▁The ▁coat ▁of ▁arms , ▁which ▁includes ▁both ▁the ▁Ser bian ▁e agle ▁and ▁Ser bian ▁cross , ▁has ▁also ▁been ▁officially ▁used ▁since ▁the ▁ 1 9 th ▁century , ▁its ▁elements ▁d ating ▁back ▁to ▁the ▁Middle ▁A ges , ▁showing ▁By z antine ▁and ▁Christian ▁her itage . ▁These ▁symbols ▁are ▁used ▁by ▁various ▁Ser b ▁organis ations , ▁political ▁parties ▁and ▁institutions . ▁The ▁Three - f inger ▁sal ute , ▁also ▁called ▁the ▁" Ser b ▁sal ute ", ▁is ▁a ▁popular ▁expression ▁for ▁eth nic ▁Ser bs ▁and ▁Ser bia , ▁originally ▁express ing ▁Ser bian ▁Orth odox y ▁and ▁today ▁simply ▁being ▁a ▁symbol ▁for ▁eth nic ▁Ser bs ▁and ▁the ▁Ser bian ▁nation , ▁made ▁by ▁extending ▁the ▁thumb , ▁index , ▁and ▁middle ▁fingers ▁of ▁one ▁or ▁both ▁hands . ▁ ▁Trad itions ▁and ▁custom s ▁ ▁Fol kl ore ▁Trad itional ▁cl othing ▁var ies ▁due ▁to ▁diverse ▁ge ography ▁and ▁climate ▁of ▁the ▁territory ▁inhab ited ▁by ▁the ▁Ser bs . ▁ ▁The ▁traditional ▁foot we ar , ▁op anci , ▁is ▁worn ▁throughout ▁the ▁B alk ans . ▁The ▁most ▁common ▁folk ▁cost ume ▁of ▁Ser bia ▁is ▁that ▁of ▁Š um ad ija , ▁a ▁region ▁in ▁central ▁Ser bia , ▁which ▁includes ▁the ▁national ▁hat , ▁the ▁Š