Guallidurth was a drow city deep beneath Calimshan in Middledark of Old Shanatar. In the late 14th century DR it had twenty-one ruling houses.These make up the Ruling Council, but more than 200 Houses vied for power.

The Drow here worshiped Lloth, but each House did so in a different way, so many different sects existed throughout the city. Since building a temple to the Spider Queen was seen as the most devotional worship one could do, the city was riddled with different temples and shrines. This gave the city its nickname as Temple City of Lloth.

After the Spellplague Mistress Mother Fizzri Khaven-Ghell systematically destroyed most of the houses until only twenty four remained.