The Palace
Scholars have said that seeing a palace in a dream signifies elevation, high status, and great authority. Whoever sees themselves entering a palace may attain significant power, improve their religious practice, and achieve much good. If one sees themselves sleeping in a palace they own, it indicates great elevation, majesty, and power, while if the palace belongs to another, they will receive benefit and good from its owner.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam
Note: These are traditional scholarly interpretations (ijtihad) drawn from a specific classical source — not a binding religious ruling, fortune-telling, or a prediction of the future.