chapel (n.)
early 13c., from Old French chapele (12c., Modern French chapelle), from Medieval Latin cappella "chapel, sanctuary for relics," literally "little cape," diminutive of Late Latin cappa "cape" (see cap (n.)); by tradition, originally in reference to the sanctuary in France in which the miraculous cape of St. Martin of Tours, patron saint of France, was preserved; meaning extended in most European languages to "any sanctuary." (While serving Rome as a soldier deployed in Gaul, Martin cut his military coat in half to share it with a ragged beggar. That night, Martin dreamed Christ wearing the half-cloak; the half Martin kept was the relic.)