The Castle (OSI)
From GURPSworld Wiki
The Castle is the name of a special highly classified training facility for magically gifted OSI agents. The location of the site is classified and known only to the inner circle of OSI/SOG-22.
Agents training at the castle live under strict monastic rule during their stay at the Castle. Silence is observed in most areas of the complex, and everyone is expected to avoid extraneous conversation. Free exchange is only permitted between pupil and teacher. Length of stay at the Castle varies with each individual and training experience.
Upon completion of training at the Castle, agents are directed to reveal nothing of detail about the site, its personnel, or its training methods.