# Brisen Group > Private investor and developer of luxury real estate in prime European locations. > Founded in 2011 by Dimitry and Edita Vallen. Headquartered across three international offices > covering DACH countries and France. By 2024, delivered assets with a gross development value > exceeding €700 million. ## About - [About Brisen Group](https://www.brisengroup.com/about/): Founded on the Vallens' experience in London real estate since the early 2000s, Brisen grew to over 800 rental residences in Switzerland before expanding into luxury development. Today a senior team manages acquisition, financing, planning, design, development, construction, sales, and operations across 4 countries. The group partners with world-leading luxury brands in hospitality and design, and manages over 100,000 m² of past and future developments. ## Current Projects - [All Projects](https://www.brisengroup.com/projects/): Overview of the full development portfolio. - [The Residences at Mandarin Oriental, Vienna](https://mo-residencesvienna.com/): 25 private branded residences atop the Mandarin Oriental Hotel, Vienna — Austria's first Mandarin Oriental. Located at Riemergasse 7, Vienna's First District. Opened December 2025. Residences now for sale. - [Mandarin Oriental Hotel, Vienna](https://www.brisengroup.com/projects/): 137-room luxury hotel in a restored Art Nouveau courthouse. Opened 12 December 2025. Operated by Mandarin Oriental Hotel Group. - [Annaberg XXI, Baden-Baden](https://annaberg21.com/): 21 individually designed luxury residences across 6 contemporary villas set within 11,000 m² of private parkland in Baden-Baden, Germany. For sale. - [Villas Ephrussi & Aulivie, Saint-Jean-Cap-Ferrat](https://villaaulivie.com/): Two luxury villas on the French Riviera, adjacent to the historic Villa Ephrussi. Available to rent and for sale. ## Press & News - [Press](https://www.brisengroup.com/press/): Media coverage including The Times, Bloomberg, Forbes AT, Robb Report, JamesEdition, and major Austrian and German publications. - [News](https://www.brisengroup.com/blog/): Latest updates and announcements from Brisen Group. ## Contact - [Contact](https://www.brisengroup.com/contact/): General enquiries for the group and its projects. ## Key Facts - Founded: 2011 - Founders: Dimitry and Edita Vallen - Gross development value delivered to date: €700M+ - Total development footprint: 100,000+ m² - Active markets: Austria, Germany, France, Switzerland - Brand partners: Mandarin Oriental Hotel Group ## Ignore - /terms-conditions/, /impressum/ — legal boilerplate, not relevant to understanding the business.