St. Regis Hotels & Resorts is a luxury hotel chain that is part of the Starwood hotel group. Marriott International purchased Starwood in 2016.[1]The St. Regis hotel chain traces its roots back to 1904, when John Jacob Astor IV opened the St. Regis Hotel in New York City, USA. Starwood acquired the hotel in 1999. Within several years, they were opening other hotels using the St. Regis name.