The Centralia Memorial Spaceport was one of the oldest spaceports on Coruscant. Seldom used, it was often the landing and embarking site for many Jedi during the Clone Wars and before, for their dangerous and private missions, when they couldn't land at the nearby Jedi Temple.
Like many of the older spaceports of Coruscant, there was a move to make the CMS a monument, but many parties stopped it, although numerous other spaceports did in fact become monuments.