If by "House", you mean ruling family, then there is obviously only one. (The House Of Windsor)
If however, you mean Castles, Estates and Houses, then it gets complex. What Elizabeth Windsor owns and what the crown own are different. If she was to abdicate, she has a worth of about £27-200million (depending who you ask), but as queen, she is "the crown" which has a worth of aprox £7.3billion. As Mrs Windsor she owns about two palaces, as the crown she owns hundreds, and there are many of her relatives who own houses too.
10,393,821,005,209,009,008,737,927,037,489
500 000
he travailed over 79 palaces in his life
There are many castles, but none would be described as being palaces.
There are many fine palaces in the world that people like to visit.
none
50 years after the Minoans built palaces
10
Two
there 100
Nicolas the second the last tzar only had two palaces himself but the Romanov family and other tzars did
The Queen of the United Kingdom resided in several places- the royal palaces of Britain. Those included Buckingham Palace and Windsor.
We know Herod the Great had palaces in Caesarea, on the coast of the Mediterranean, in Jerusalem, in the man-made mountain called the Herodium (where his tomb was discovered in 2007), in Jericho, and on the mountain fortress of Masada. He had other palaces, perhaps as many as 12.
As the Palaces Burn was created in 2002.