Arbre

First Appearance and Context

Arbre is continually present in mathic practice and speech. The world’s name anchors formal dating in the A.R. era used on citations and records, and in communal spaces such as the Mynster and narthex, orreries display a lapis sphere representing Arbre to mark time and departures.

Description and Location

Arbre is the inhabited world on which avout live within the Mathic World and others live extramuros beyond the walls. Daily life couples timekeeping with skywatching from rooftop installations (see Starhenge). Historical accounts also note climate shifts and migrations following the Terrible Events.

Structures and Features

• Observational works: starhenges at maths and all-sky devices used to record fast-moving tracks; orreries that include a sphere for Arbre as the local reference.
• Networks in the Sæculum: hard‑surfaced roads and a navigation‑satellite system used by cartablas; on a recent morning, devices across a wide region failed to obtain fixes, defaulting to continental maps (cause unconfirmed).

Relationships and Affiliations

• Calendrical and institutional: Arbre’s name and motions frame dating and observance in the A.R. system and anchor the mathic calendar.
• Cultural landmarks: references to the “Three Inviolates” commonly point to maths at the Concent of Saunt Edhar, Saunt Rambalf’s math, and the Concent of Saunt Tredegarh.

Current Status

Arbre is inhabited and active. Ground observers report an object in Arbre‑centered orbit following a non‑polar path, accompanied by visible red illumination aimed at notable maths on at least one night; examples shown on news feeds included the Millenarians’ spire at Saunt Rambalf’s and a bluff‑carved math at Saunt Tredegarh. Some onlookers infer that this signaling might highlight sites long associated with sensitive storage (treated here as conjecture). Separately, the navigation‑satellite outage noted above has been attributed in rumor to a festival by some extramuros sources, while others propose deliberate interference or damage; these attributions remain unverified.