Dalek City

The Dalek City was the home of the Daleks on Skaro.

History
At the time of the First Doctor's visit to the planet, the city dated back from before the Thousand Year War. The Daleks lived not in the city itself, but rather below it where they thought they were shielded from radiation.

The entire city ran on static electricity transmitted through metal floors, which the Daleks of this era of Skaro history required to power their casings. As a consequence of this dependence, the Daleks were unable to leave their city. They were unaware that a group of Thals had also survived the neutronic war.

The city at one side had a natural protection in the form of the Lake of Mutations. Near the swamp was a lake where the Daleks got their water.

After the Daleks were destroyed, the Thals moved into the City. (TV: The Daleks)

During the war between the Humanised Daleks and the Daleks ruled by the Emperor Dalek, the Daleks had a city which the Second Doctor, having visited before, knew how to navigate. Fighting between the two groups of Daleks devastated the city. (TV: The Evil of the Daleks)

after the Civil War. The Daleks rebuilt the Dalek City and introduce a new command structure involving Gold Daleks replace the Black Daleks. (TV: Day of the Daleks, PROSE: Day of the Daleks)

Following the Imperial-Renegade Dalek Civil War. A brief but destructive war began on the city. (PROSE: War of the Daleks)

After the Cult of Skaro was formed, they headed on the secret Strategy Chambers of the Cult of Skaro. a special area of the city away from other Daleks. (PROSE: Birth of a Legend)

Behind the scenes
The Dalek Handbook states that the city was named Kaalann. However, after the Fourth Doctor's intervention with the Creation of the Daleks, the new timeline which was created makes it uncertain whether the city was named Kaalann or if it is the same Dalek city the Eleventh Doctor later travelled to when the Daleks wiped out humanity with the Eye of Time. The Doctor's dialogue then — "Last time I saw it, it was in ruins and the Daleks had fled" — suggests both cities are still the same.

The Target novelisation of Remembrance of the Daleks states that the Dalek city is called Mensvat Esc-Dalek and is located in the Vekis Nar-Kangji (Plain of Swords).