Chicago's iconic IBM Building, designed by Mies Van der Rohe in 1966, welcomes the Langham Hotel to its hallowed halls this month. Originally conceived as an office building, the 40-year-old tower has been sensitively transformed by UK-based design hospitality firm Richmond International into a luxurious, modern hotel that respectfully does its design heritage justice. The entrance opens onto a minimalist lobby that boasts 20ft windows and white travertine walls, in keeping with Mies's aesthetic. Designed by his grandson, architect Dirk Lohan, the space also features two never-produced sofas Mies designed for his daughter Waltraud, and a reception desk by Lohan, based on an original design from Farnsworth House. In addition to sumptuous rooms that keep to a modern-contemporary theme, the hotel also houses Travelle, an all-day Mediterranean restaurant and bar created by Rockwell Group, with specially designed drink trolleys for the ultimate, mid-century throwback.