mid-13c., "portable sanctuary carried by the Israelites in the wilderness," from Old French tabernacle (12c.), from Latin tabernaculum "tent," especially "a tent of an augur" (for taking observations), diminutive of taberna "hut, cabin, booth" (see tavern). Transferred late 14c. to the Temple in Jerusalem (which continued its function). Sense of "house of worship" first recorded 1690s. The Jewish Feast of Tabernacles (mid-October) was observed as a thanksgiving for harvest.