Perched atop the Four Seasons Hotel, this 7,000 square foot duplex unit at 132 East Delaware has got to be one of the most extravagant places for sale in downtown Chicago right now. Beyond its famous address and large size, the unit has been reworked by interior designer Juan Pablo Molyneux and architect Marvin Herman and looks like a Venetian palace in the sky. The custom finishes and designer fixtures are certainly high end, but the place is definitely on the louder end of luxury units (this is definitely not a minimalist space). Wine drinkers will certainly be able to make use of the home's 2,000 bottle cellar and tasting room while movie buffs are likely to enjoy the home theater. Big spenders will have to drop $6.4 million and an additional $6,452 per month in assessments to call this sky-high mansion their home.