TIL: Antilia is one of the most expensive private residences in the world, costing over $1 billion. The billionaire had his entire family live in the 27 story home which requires 600 servants and has 168 car garage, 9 elevators, a theatre, pool, ballroom, and snow room. It was built on an orphanage.

https://en.wikipedia.org/wiki/Antilia_(building)
https://www.reddit.com/r/todayilearned/comments/15cs59i/til_antilia_is_one_of_the_most_expensive_private/