Designed by Italian architect Niccolo Michetti, the grandiose palace and surrounding manicured gardens are a humbling example of Tsarist extravagance, but just as important a reason to visit is that this is also home to the foreign art collection of the Art Museum of Estonia.
The Kadriorg Art Museum displays hundreds of 16th- to 20th-century paintings by Western and Russian artists, as well as prints, sculptures and other works.
While here, don't miss the decadent, two-storey main hall, with its elaborately painted ceiling and stucco work, or the room used as an office by Estonia's head of state before the nearby Presidential Palace was built.
Surrounding the Palace are several interesting palace side buildings. For example the restored kitchen building is now occupied by a cosy art museum called the Mikkel Museum, and the humble summer estate is the Peter I House Museum. The palace governor’s house (the castellan’s house) is now home to the Kastellaanimaja Gallery and the Eduard Vilde House Museum.