"At least $40 billion,” Belkovsy told the Guardian in 2007. “Maximum we cannot know. I suspect there are some businesses I know nothing about." Putin’s trophies of wealth are far from subtle. His $1 billion palace on the Black Sea features “a magnificent columned façade reminiscent of the country palaces Russian tsars built in the 18th century,” according to the BBC, which also procured evidence that a secret slush fund had been created by a group of oligarchs to build the estate for Putin, personally.