BAU, the world's leading trade fair for architecture, materials and systems, takes place every two years. Everyone involved in the planning, construction and design of buildings internationally comes together here: Architects, planners, investors, industry and trade representatives, craftsmen and many more. BAU pools the know-how of all sectors and trades at a high international level. It promotes creative exchange, facilitates contacts and releases synergies. BAU has always been the ideal place for investment decisions. It enables exhibitors to enter new, international markets and provides all visitors with real, practical future prospects and sustainable added value.