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The Military Order of Saint Benedict of Aviz (Portuguese: Ordem Militar de São Bento de Avis, pronounced [%C9%90%CB%88vi%CA%83]), previously to 1910 Royal Military Order of Saint Benedict of Aviz (Portuguese: Real Ordem Militar de São Bento de Avis), previously to 1789 Knights (of the Order) of Saint Benedict of Aviz (Portuguese: Ordem de São Bento de Aviz) or Friars of Santa Maria of Évora, is a Portuguese order of chivalry, founded in Portugal in 1146. It gave its name and coat of arms to the Aviz Dynasty that ruled Portugal between 1385 and 1580.