The earth is under attack by aliens but they don't know it. It all began during the 1900's, a lone alien was sent to earth. His mission was to destabilise the earth's government so that the aliens can take over without any resistance. The alien, a master of disguise, lodged himself firmly in the government and started to cause havoc, untraceable to him of course. Through various means, he caused world wars 1 & 2, aided the development of the nuclear bomb and when the bomb was perfected, ignited world war 3 - the final war - apocalypse.
The humans have been reduced to his slaves and he is just waiting for the aliens to arrive take over. To show off his prowess, he has commissioned the creation of a mansion which will highlight the best things available on earth, according to him.
The mansion is going to be the most exquisite mansion ever built, displaying the riches and power he commands, extravagant. The pillars of the mansion are carved from ivory, inlaid with gold, studded with diamonds. Exquisite paintings hang from his wall. His wines are the best, the costliest. His food is made from animals long thought extinct. Over his one and a half century long stay, he has amassed all these things through various means and is now putting it on display.
He wants the mansion to be plush and comfortable, filled with elegant, wonderful unique things.
What are some of the things that have to be present in the mansion ?
Note: As it is a mansion, size limitations obviously apply. Also the alien abhors technology and wants to avoid it if possible but if he cannot then he wants the best.