The incredible real estate portfolio of Oracle billionaire Larry Ellison

Former Oracle CEO Larry Ellison is no stranger to the real estate market - he's been called "the nation's most avid trophy-home buyer" and has all but taken over entire neighborhoods in Malibu and the Lake Tahoe area.

When asked by CNBC in 2012 why he would buy more homes than he could possibly live in, Ellison referenced his love of art.

"I'm going to start these art museums that are basically converted homes, and I have one for modern art, and I have one for 19th century European art, and one for French impressionism," Ellison said to CNBC. "I've got Japanese. I own a home in Kyoto, Japan actually on the temple grounds in Nanzenji that is going to become a Japanese art museum. So, a lot of them are museums."

Though his 2012 purchase of the Hawaiian island of Lanai has been his largest overall investment by far, he's made a number of blockbuster purchases over the last two decades.