Canonum De Lex Ecclesium
Canons of Ecclesiastical Law
I. Introductory provisions
1.2 Concepts
Article 23 - Sanctuary
Canon 3588 (link)
A Sanctuary is the consecrated or sacred area of a temple around its altar or tabernacle.
Canon 3590 (link)
Where a historic sanctuary is constructed upon the burial ground of human remains, or their deliberate inclusion in a temple, then such a sanctuary shall be considered a lesser sanctuary on account of the influence of the remains.