Augustinus Bader Debuts Largest Branded Spa, at Hôtel Costes in Paris

PARIS — Augustinus Bader is opening its largest branded spa, called La Piscine, at the Hôtel Costes in Paris on Monday.

The sweeping 10,350-square foot location, on the hotel’s minus-one floor, has seven treatment rooms, including one double.

Charles Rosier, Augustinus Bader chief executive officer and cofounder, worked closely with Jean-Louis Costes and his wife Marie-Laure Ettori on the spa, which was designed by Christian Liaigre. His furniture decorates the place.

There are two reception areas, plus a view onto the 65-foot pool, open to hotel guests.

Rosier began talking with Costes about the idea of a spa in 2019, a year after the beauty brand was launched. More recently, enormous work was done at the hotel. Its spa area’s footprint was tripled as the hotel expanded into neig