We are pleased to present one of the most exclusive and unique properties on the market today. Its almost 1,000 meters built, and distributed on 3 floors, represent more than 60% of a beautiful nineteenth century mansion in the Barrio de las Letras, completely renovated by the owner, one of the most recognized firms of interior design and high decoration at national and international level. Currently, the owner enjoys the property, using the first two floors (semi-basement and mezzanine) for the development of his professional activity, leaving the second floor as his personal residence. The office area, with almost 600 meters, consists of a large reception area, ideal for events and presentations. The rest of the spaces that complete this professional area are divided into work rooms, meeting rooms, offices, office, etc. A spectacular journey through the heart of the owner's work, where some of the most awarded and well-known works of national interior design have been developed. On the second floor of the building, the main floor, we can enjoy, in its almost 400 meters, some of the most elegant and beautiful rooms of the current real estate market, with French-style lounges, Bristol Bar, a beautiful and cozy interior terrace of more than 40 meters with fruit trees, a very large hall and a beautiful dining room, library, master suite, kitchen and service area.The property is a jewel to be discovered, and very versatile, thanks to its distribution, since it allows to combine, as currently, the professional activity and personal residence in the same building, or to realize a whole space of residence or offices. There is also a project to create 12 luxury suites, distributed over the three floors of the entire property. A unique product for a special buyer.