A palace was an architectural structure used as a residence for royalty or nobility.
History and specifics[]
In the 2250s decade, Captain Christopher Pike was captured by Dindamorii rebels and held in the governor's palace on Dindamor. He was rescued by Spock and J. Mia Colt. (TOS novel: Legacy)
In the year 2268, Corben once called the dwelling place of the Inquisitor as a "palace", although it was referred to as a "castle" in every other instance. (TOS comic: "Day of the Inquisitors")
The Nagal Residence was described as a palace. (DS9 novel: The 34th Rule)