Balanystra was a planet.
Circa the 57th Segment of Time, (TV: The Ark) Balanystra was one of the planets where humanity survived, along with Refusis II and Frontios, after the destruction of Earth. (PROSE: Perfect Day)
The Seventh Doctor noted a place of worship on Betrushia was familiar to a Gallifreyan hall, English college or Balanystran learning block. (PROSE: St Anthony's Fire)