Though debated by historians, it was generally believed that Coruscant was the original homeworld of humanity. The entire planet is one big city.' ― Ric Olié Ĭoruscant (pronounced / 'kɔɹəsɑnt/), also known as Imperial Center during the rule of the Galactic Empire, was an ecumenopolis-a city-covered planet, collectively known as Imperial City- in the Coruscant system of the Core Worlds. ' Coruscant, the capital of the Republic.