Sirius 5

Sirius V was a planet that contained the Academia Stellaris, considered by Romana II to be one of the greatest art galleries in Mutter's Spiral, though the Fourth Doctor considered the Louvre better. (TV: City of Death)

The Prolocutor of the Babblesphere was copied onto a hard drive by the Fourth Doctor and donated to the Library of Artificial Intelligence in the Academia Stellaris on Sirius V. (AUDIO: Babblesphere)

The Tenth Doctor later offered to take Gabby Gonzalez to the gallery, before deciding on a better one. (COMIC: The Arts in Space)