Scars of Faerûn
Cormanthyr is one of many Tel’Quessir (elven and eladrin) empires that have graced Faerûn. For much of recent history it has been in ruin, though recently it has risen again under a new Coronal, Ilsevele Miritar.
Its capital was once named Cormanthor and was the first of any city to have a mythal (a mgically protective barrier) created by wizardry, whereas previously, all mythals were created by elven High Magic.
After the mythal was raised the capital was referred to as Myth Drannor.