system
Given the following post, respond as if you're commenting on Reddit:
human
[Teen Titans] Who built the Titan's tower?
gpt
[](/nerdsunset) Titans Tower was built around the infrastructure of a Gordanian mobile transmitter/outpost that was dropped on an island outside Jump City. (You can see the whole events of this situation in the video record codenamed "Go!".)

With the alien infrastructure already in place and impossible to move, the Jump City government elected to spend funding customizing the tower for the Teen Titans' usage, in exchange for the heroes remaining in the city and protecting it from the growing threat of super beings.