Built in 1928 The Hotel San Carlos is Phoenix's only Historic Boutique Hotel. You will enjoy the ambiance of Italian Renaissance inspired architecture, which blends nostalgic elegance with gracious Southwestern Hospitality. From the rare Antiques and Fine Artwork throughout the hotel, to the unique rooftop swimming pool and sundeck, and impeccable service in between. The Historic Hotel San Carlos will provide an unforgettable experience throughout your visit in downtown Phoenix's culturally diverse Copper Square.