I am descending the staircase in an elegant little apartment at the eastern tip of the Île Saint-Louis in the heart of Paris. With me is Christophe Chastel and, with each step, we have views through leafy chestnut trees directly onto the Seine, where river craft of all kinds are passing.
The apartment we are visiting is the Rose, one of dozens in the Guest Apartment Services portfolio founded on the island by Chastel and his partner, Philippe Pée, in 1997, most of them decorated by Chastel to celebrate their 17th-century heritage.