Third Centennial Apert

The Third Centennial Apert is remembered as a centennial instance of Apert associated with the rare opening of the Centenarian Gates at several Hundreder maths. Contemporary accounts summarize a series of unsettling outcomes revealed when the gates opened, and the aftermath shaped mathic institutions thereafter.

Notable incidents (as recorded)

• At Saunt Rambalf’s concent, a mass suicide was discovered moments after the gates opened.
• At Saunt Terramore’s, the opening revealed nothing—no people and not even human remains.
• At Saunt Byadin’s, visitors encountered a previously unheard‑of religious sect calling themselves the Matarrhites (reported as still existing thereafter).
• At Saunt Lesper’s, no humans were present, but a previously unknown species of tree‑dwelling higher primates was found.
• At Saunt Phendra’s, a crude nuclear reactor was discovered in a system of subterranean catacombs.

These and other mishaps are cited as prompting the creation of the Inquisition and the institution of hierarchs in their modern forms, including the office of the Warden Regulant empowered to inspect and enforce Discipline across maths.

Usage and legacy

• The derogatory slang “to go Hundred” (to lose one’s mind or stray from sound theorics) is traced to reactions to the Third Centennial Apert and its revelations.

Context

• This event is a centennial instance within the broader tradition of Apert, specifically tied to the rare operation of Centenarian Gates that open on a hundred‑year cycle among Hundreder maths.

Current status

• The Third Centennial Apert is a historical reference point within the mathic world; its institutional consequences and idiomatic echoes continue to be noted in later accounts.