A Palace for Putin. The Story of the Biggest Bribe - Alexei Navalny release detailed investigation. It includes Drone footage and 3D reproduction inside the palace https://youtu.be/ipAnwilMncI?t=3245 (English subtitles available)
In 1881, Lev Tolstoy described Moscow thus in a diary entry: “Stench, stones, luxury, poverty. Dissipation. A collection of robbers who have plundered the people and conscripted soldiers and judges to guard their orgies while they feast.”
https://en.wikipedia.org/wiki/Putin%27s_Palace