The Kaled Dome was the home city of the Kaled race on Skaro. The Thals, their enemies, lived in the Thal Dome across the wastelands. The dome held thousands of Kaleds. Buried underneath the dome was a bunker, the base of Davros and the Kaled Scientific Elite. When the Thals launched their missile, the bunker was unharmed but the entire Kaled dome was destroyed. (TV: Genesis of the Daleks)
Thousands of years later, the Daleks returned to find Davros (whose destroyed tissue had been regrown while his body was in suspended animation) in the hope he could reprogram their battle computers to win the Dalek-Movellan War. Using a combination of robot drills, explosives and slave labour, they retrieved him. (TV: Destiny of the Daleks) The Dalek Prime claimed that this event was staged on a planet called Antalin as part of a plot to trick Davros and the Seventh Doctor into destroying Antalin and not Skaro. (PROSE: War of the Daleks)