Gernica

Gernica was the home planet of Viola Wordsmith. Gernica fell victim to the Last Great Time War and was erased from existence, before it was restored back to existence as a side effect of Viola Wordsmith's restoration to existence by the Ninth Doctor.

The Sixth Doctor once visited Gernica in the 64th century in the company of Evelyn Smythe. (AUDIO: Death Will Not Part Us)