Queen's Mirrors

Locations:
 * See.
 * Albia presumably has one.
 * The Royal Collection of Inconvenient Oddities building in Londinium has a found in an icebound temple in the Alps.
 * Red Cathedral in Mechanicsburg. (link...)
 * A compatible device in The Refuge of Storms, presumably destroyed. (link...)

Related Devices
Other transport devices. Possibly part of the same network and possibly the same technology.




 * The semi-canonical.