The Old West-style casino closed last year and was to open as the Gansevoort, but Caesars ended its relationship with the Gansevoort Hotel Group in the fall after the state of Massachusetts questioned the partnership.
The Cromwell, located in the heart of the Strip, is expected to have a subtle Parisian theme. It will include a rooftop pool and Drai's day and nightclubs. Caesars is calling it Las Vegas' first "luxury lifestyle boutique hotel."
Caesars had been a partner in a Massachusetts casino bid, but it withdrew in October after Massachusetts Gaming Commission staff raised concerns stemming from a background check.
A commission report, among other things, raised questions about Caesars' licensing agreement with a subsidiary of New York-based Gansevoort Hotel Group. The report said a Gansevoort investor has been under scrutiny, though not charged, over alleged ties to Russian organized crime.
The renovation of Bill's cost $185 million. Among other things, Caesars added hardwood floors, black and white tile shower walls, and plush seating to the hotel rooms.
"The Cromwell will bring an exclusive experience to the Las Vegas Strip as a luxury lifestyle boutique hotel focusing on hospitality, amenities and personalized service," Cromwell general manager Karie Hall said in a statement.
Hannah Dreier can be reached at http://twitter.com/hannahdreier