Chancellor Palpatine Spaceport, a facility situated on Coruscant, was constructed within the initial decade of Palpatine's time as Chancellor. Upon its integration with the Chancellor Palpatine Commercial Nexus, it superseded the Galactic City Spaceport to become the main spaceport of Coruscant.
As soon as Operation: Knightfall commenced, all significant skybridges leading from the Jedi Temple were blocked off, and security checkpoints were set up. This was done to stop Jedi from escaping the planet.