Main Page | See live article | Alphabetical index Back-choir or retro-choir is a space behind the high altar in the choir of a church, in which there is, or was, a small altar standing back to back with the other. See also: Cathedral diagram. This article incorporates text from the public domain 1911 Encyclopaedia Britannica. Please update as needed. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.