Antonio Citterio and Patricia Viel are the founders of Antonio Citterio Patricia Viel, whose headquarters are in Milan. The firm works internationally, developing complex projects on all scales in collaboration with a qualified network of specialist consultants. The practice has a strong expertise in providing detailed project documentation covering both the shell and core and the interior of a building, from building envelope to interior fit-out, including bespoke millwork elements and furniture. Among the types of projects developed by the practice are: town planning schemes, residential and commercial complexes, production facilities, restoration/reuse of historic buildings, offices, showrooms and hotels. The firm is also active in the sector of corporate communication, handling projects of coordinated image, installations and graphics. Recent built works include the Ermenegildo Zegna group headquarters in Milan (Italy), the Bulgari Hotel in London and the Technogym Village in Cesena (Italy). The firm takes part in national and international design competitions, and is ISO 9001:2008 certified. A fully owned subsidiary of the Italian company was incorporated in 2015 in New York.