In "Star Wars", what was the official name of planet-wide city Coruscant during the Galactic Empire?

Coruscant is an ecumenopolis planet in the fictional "Star Wars" universe. It first appeared onscreen in the 1997 Special Edition of "Return of the Jedi", but was first depicted and mentioned by name in Timothy Zahn's 1991 novel "Heir to the Empire".

Coruscant was historically referred to as Notron or Queen of the Core; was renamed Imperial Center during the reign of the Galactic Empire (as depicted in the original films) and Yuuzhan'tar during the Yuuzhan Vong invasion (as depicted in the "New Jedi Order" novel series). The planet's capital city was initially Galactic City (built at least in 100,000 BBY (Before the Battle of Yavin,), partially destroyed in 27 and 44 ABY (After the Battle of Yavin)); under the Galactic Empire this was Imperial City, and was Republic City or the City Of Spires under the Galactic Republic. The planet was code-named Triple Zero during the Clone Wars. The demonym and adjective form of the planet name is Coruscanti.

The First Galactic Empire is a fictional autocracy featured in the "Star Wars" franchise. It was first introduced in the 1977 film "Star Wars" and appears in its two sequels: "The Empire Strikes Back" (1980) and "Return of the Jedi" (1983). It is the main antagonistic faction of the original trilogy.