Bill Gates and his boyhood pal Paul Allen both had an early interest in computer programming and a penchant for discovering faults and automating processes. The two co-founders of Microsoft released Windows 1.0 in 1985 and went public the following year. Within a year, Gates had amassed a fortune of $350 million, making him a billionaire at the age of 31. After stepping aside as Chairman and then from day-to-day operations, he still ranks among the world’s five richest persons. While Gates has reduced his spending, his $124 million house in Seattle is still the largest single acquisition in his $118 billion fortune.

Bill Gates’ investments in real estate have skyrocketed in value, and he often purchases high-performance vehicles. The palace is such a technological marvel that Gates and his family have dubbed it Xanadu 2.0. Let’s go on a tour of Xanadu 2.0, Bill Gates’ $124 million mansion.

It’s no surprise that Bill Gates intended to construct his enormous house in Seattle, where he was born and raised and where he also established the headquarters of Microsoft. It took seven years to complete the construction of the Gates family’s 66,000-square-foot dream house after he acquired the lakefront site in 1988 for $2 million. The property, which he reportedly built for $63 million and dubbed “Xanadu 2.0,” was featured on the cover of Business Insider. The name alludes to the lavish mansion that Charles Foster Kane’s character, played by Christian Bale, inhabited in the film Citizen Kane.

Bill Gates invested not just on building, but also in purchasing the adjacent properties for $14 million to guarantee that his family would have complete seclusion. The Pacific Northwest provided the inspiration for the design of Xanadu 2.0, which has a lodge-like aesthetic. According to Re-Thinking the Future, seven different kinds of stones and Douglas Fir trees that were more than 500 years old were employed in the building process. Three hundred workers were needed to maintain the estate, including one hundred electricians.

French associate architect Thierry Despont created the home’s interior in the 1980s while repairing the Statue of Liberty. The home contains 7 bedrooms, 24 baths, 6 kitchens. The six kitchens are in corners, so one is always accessible. The main dining hall seats 200, while a smaller area seats 24 by the fireplace. The estate boasts a 25,000-square-foot gym, steam room, and sauna.

Bill Gates, an art and literature aficionado, has taken extra care to showcase books and artwork. Projection on wall-mounted computer displays frames paintings. Gates has a 2,100-square-foot library with a Great Gatsby reading dome, according to Yahoo Finance. Gates bought Codex Leicester by Leonardo Da Vinci for $30.8 million at an auction and placed it in the chamber. One of his rooms is a 20-foot-ceilinged trampoline complex.