As Alexei Navalny's investigation revealed, the palace has its own church, wine cellar and casino. It has a hookah lounge with a stripper pole, an arboretum and an ice rink for the hockey games Putin likes to play with friends.

But of course, security is tight. Putin's house is separated from the country he rules by 6,900 hectares of forest and a special no-fly zone.

Caution is more than paranoia on Putin's part. Earlier this month, Russian authorities claimed that two drones had attempted to assassinate Putin in a botched strike that ended in an explosion over the Kremlin.

In fact, the construction plans for"Putin's Palace" were publicly posted on the Internet."Metro Style," a now-defunct Russian entrepreneur, posted the designs on his website to showcase his work in the early 2010s. They were viewable online until 2016.