Is it new or is it original? The design details in the renovated Union Station’s Great Hall, which debuted in July, will have you speculating till your neck aches. Scores of brass sconces? Original. Massive pendant chandeliers? New. Marble-accented walls? Both.

In managing the $54 million makeover, the creative team at JG Johnson Architects seamlessly connected period elements from the Great Hall’s 1914 origins with chic, modern pieces. “We wanted the design to balance that feel of train travel’s heyday with a timelessness that would never come off as trendy or dated,” says Heather Vasquez, project manager for the architectural and interior design team.

Original details such as geometric designs in the windows, cast-plaster moldings, and brass finishes on the sconces and clocks guided the team’s choices for new additions: Pendant lights are either globes or classic schoolhouse shapes. Brass accents, like nail heads on furniture in the conversation areas, connect to original pieces. And the combination of wood, leather, and natural-fiber fabrics adds a cozy factor to the marble walls and terrazzo tile floors. “We set out to create ‘Denver’s living room,’?” says Vasquez. Whether or not we have a train to catch, you’ll find us lounging there.

Lighting These globe pendants are used inside Pigtrain Coffee Co., the Great Hall’s resident java shop. $480, Rejuvenation,

Signage The designers had fun with the Terminal Bar’s filament lighting sign. Shop Etsy to add some vintage glamour to your space. $150, Vintage Filament,