Originally designed by Juan de Villanueva (whose other work included the iconic Prado Museum), this 18th-century mansion house has been given new and stylish interiors by the NH Collection. The brand is skilled at preserving the charm of heritage buildings while infusing a playful trendiness and this is no exception — an especially nice touch are the glass-covered exhibits on the ground floor. Single bedrooms through to family suites can be booked, there are 85 rooms in total, with those on the top floor providing skylights and wooden cathedral ceilings. The hotel is surrounded by theatres and other points of interest.