Canonum De Lex Ecclesium
Canons of Ecclesiastical Law

one heaven iconI.   Introductory provisions

1.2 Concepts

Article 26 - Basilica

Canon 3617 (link)

A Basilica is a large Temple representing the highest court and sanctuary of a whole region for instruction, administration and sacred ceremony by competent authority of a particular Religion or Cult. Hence, a Basilica is also usually the site of a See.

Canon 3618 (link)

The term Basilica is equivalent to the term Cathedral.

Canon 3619 (link)

As the Society of One Heaven is the First See, the one See and only true Holy See, all lesser See and Basilica are by default the property of One Heaven and subject to the authority of One Heaven.