The Dark Stalkers of Faerun
Spellgard (formerly known as Saharelgard) was the ruin of an ancient castle complex dating from the Netherese Empire located on a rocky ridge, northeast of Llorkh, where the southern edge of the Fallen Lands meets the eastern edge of the former Anauroch desert.
Spellgard was once ruled by Lady Saharel, a high mage of ancient Netheril.At its apogee, Saharelgard was a rich storehouse of wealth, mighty magic, as well as luxurious dress, decoration, furnishings, and food. Subsequently it was a ruin, largely stripped of its riches by time, thieves, and abundant mosses, molds, and fungi that grew in its halls. It was a huge place of turrets, towers, crumbling walls, archways, balconies, and mile upon mile of interlinked stairs, galleries, and chambers.1.
A few structures remained largely intact, such as the imposing Scepter Tower. (Now Spelgard is home to a monastary of monks) (Sam: Not sure about the later information. Everything from before I got from Forgotten Realms Wiki.
Caitlin knows this information.