Hagioscope

hagioscope

In medieval architecture, a low window in the chancel wall of a church, often guarded by a wooden shutter and iron bars, to enable lepers gathered in the churchyard to attend Mass.

Fuente: New Catholic Dictionary

Hagioscope

a word used by English ecclesiastical writers to describe openings made through different parts of the interior walls of the church, generally on either side of the chancel arch, so as to afford a view of the altar to those worshipping in the aisles.

Fuente: Cyclopedia of Biblical, Theological and Ecclesiastical Literature