Hundreds of thousands
Millions of tons
- "Is it my imagination or does that look like-"
"The central spire of Atlantis?"
- —John Sheppard and Teyla Emmagan
The Tower is a city-ship almost identical to Atlantis. Its name comes from the fact that only the top of the control tower is visible; the rest of the city is completely overgrown with vegetation and the other towers have fallen, possibly due to Wraith attack. Also, parts of the underground city have collapsed because of earthquakes. The Tower has a bay full of unpowered gateships and a large number of drones. The most noticeable difference between the Tower and Atlantis is that the control chair is in where the Stargate would normally be rather than in a separate tower.
Long ago, the Tower was used to protect the planet from the Wraith. Possibly, the Wraith lost interest in the planet and left for unknown reasons. The Lord Protector then began using the Tower's drones to intimidate the people of the village below if they did not comply with his wishes.
By the time the Atlantis expedition discovered the overgrown city-ship, it was ruled by a primitive people who had no idea what the place really was but some of which had the ATA gene and as such could operate the city's control chair but their bloodline was dwindling fast. The city's single remaining ZPM was nearly depleted when the team got there, which was depleted by McKay powering the city's stardrive to save a nearby village from a drone attack. The majority of the city's gateships and drones were then given to Atlantis in exchange for an IDC and medical supplies.