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Anno Ordinis stresses
relig.	в ... год со дня основания Ордена (Latin for "in the Year of the Order"; a date designation system used by the Knights Templar, with 1118 subtracted from the current date)
English thesaurus
Anno Ordinis
abbr., relig.	A.O.
abbr., relig., lat.	A.O. ("in the year of the Order")