Tiamat's temple

Tiamat's temple was an unholy fortress dedicated to the worship of Tiamat, the Queen of Dragons. Resting within her realm on the plane of Avernus on the Nine Hells, the temple briefly ascended to Toril at the Well of Dragons during the late 15 century DR.

Location
The temple could be found in Tiamat's Lair, the goddess' divine realm in Avernus.

Structure
The layout of the temple vaguely resembled a five-pointed star, with five chapels built at each of the star's points around a central apse. Each chapel corresponded to one of the five colors of chromatic dragons that composed Tiamat's physical form. Massive spires rose above both the apse and the five surrounding chapels, the latter of which came together to at the central spire.

The central spire rose another above the point where all the spires met, terminating in a site referred to as the temple's sanctuary.

Interior
The temple lacked any true interior, as no walls connected or closed off the five chapels or the spires above. There were no traditional means of conveyance to ascend the spires, such as staircases or ramps, and the temple's heights could only be reached by some means of flight.

History
In the 1480s DR, Red Wizards from Thay working alongside the Cult of the Dragon performed a powerful ritual that summoned Tiamat's temple to the Well of Dragons in Faerûn.