Anastasia
From Tardis Wiki, the free Doctor Who reference
The Anastasia was a spacecraft that was smaller on the inside. According to research conducted by Tim Quinn and Dicky Howett, it was on the same evolutionary tree as the Doctor's TARDIS which was bigger on the inside. (NOTVALID: Origins of Who?)
Behind the scenes
The Anastasia was a spacecraft from Dan Dare and the property of the titular character.