Chancellor Palpatine Spaceport was a facility built on Coruscant during the first ten years of Palpatine's chancellorship. When it was connected to the Chancellor Palpatine Commercial Nexus, it became Coruscant's primary spaceport, taking over that position from the older Galactic City Spaceport.
Immediately after Operation: Knightfall was put in action, all major skybridges on approach from the Jedi Temple were cordoned off and checkpoints were established in order to prevent Jedi from reaching a way off of the planet.