The team behind what is expected to become St. Pete’s tallest tower marked a major milestone Wednesday evening with the grand opening of the Waldorf Astoria Residences sales gallery.

Located at 100 2nd Avenue South in the City Center office tower, the gallery features a full model unit that cost more than $1 million to build, giving prospective buyers and the public an early look at what the 50-story project will offer.

Rising 539 feet at 150 2nd Avenue South, the 163-unit Waldorf Astoria Residences will be St. Pete’s first hotel-branded luxury condominium tower.

The $500 million project is being co-developed by Miami-based Property Markets Group and St. Petersburg-based Feldman Equities, in partnership with Vancouver-based City Office REIT and Orlando-based Tower Realty Partners. Hilton will manage the residences, while Smith & Associates Real Estate is leading sales.