Arcadia (city)

Arcadia was, according to the Eleventh Doctor, "Gallifrey's second city". (TV: The Day of the Doctor) During the Last Great Time War, it was thought to be "the safest place on Gallifrey", protected by 400 sky trenches. Nevertheless, Dalek forces managed to breach these supposedly impregnable defences on the last day of the War. This lead to the fall of the city, which was depicted in a painting. The War Doctor was present. (TV: The Last Day, The Day of the Doctor)

During the Fall of Arcadia, the War Doctor borrowed the gun of a Time Lord soldier to blast the message to both Daleks and Time Lords on a wall - "No more". Once the message was completed, he flew his TARDIS through a wall and into a group of Daleks before fleeing the city. (TV:The Day of the Doctor)

The Tenth Doctor later mentioned that he was present at the Fall of Arcadia, and that he still hadn't gotten over it. He hoped one day to come to terms with it. (TV: Doomsday)