The Greenheart city of the Emerald Kingdom was its capital. Located around the center of the kingdom, it was one of the biggest cities in all of the empire.
Also, being located right next to the Beast Paradise as well as the fact that it had the Hundred Blossom Valley, it was also one of the main hubs where alchemists gathered to learn and share their craft with others.
Alex arrived outside of the city on a rather fast-flying boat that was used by the army on which he was escorted. After learning that he did not wish to use the teleportation formation and instead wanted to fly all the way here, the Crown Prince himself had ordered the men to send him here this way.
Alex landed outside of the city with 3 members of the army walking with him. 2 of them were of lower status, but one was a general who was made to guard Alex and the two Elders that had come with him.