Cardassian Union insignia image.
The Hall of Records was a location on the planet Cardassia Prime. (DS9 novel: A Stitch in Time)
Thrax Sa'kat and Kutel Esad once met in the Hall of Records to conduct an information exchange. (DS9 - Terok Nor novel: Dawn of the Eagles)
In 2380, after the events of the Dominion War, this structure had been reduced to rubble. It was the site where a number of Cardassians gathered in order to determine how they would rebuild their civilization. (DS9 - Prophecy and Change short story: "The Calling")