The JHS or IHS monogram of the name of Jesus (or traditional Christogram symbol of western Christianity), derived from the first three letters of the Greek name of Jesus, Iota-Eta-Sigma (ΙΗΣΟΥΣ).
Partly based on memories of church decorations.  Has some degree of resemblance to a portion of the emblem of the Jesuits, due to common medieval influences (see Feast of the Holy Name of Jesus), but is not exactly the same, nor intended to be so.
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user:AnonMoos