Operation of an architectural office, including all related activities such as planning, construction management, cost planning, real estate valuations, expert opinions, construction supervision, contract execution as general or total contractor; participations; acquisition, sale, encumbrance, management, rental and development of real estate; financing and provision of guarantees and sureties for subsidiaries and third parties; acquisition, registration, management, encumbrance and sale of patents, licenses and intellectual property rights of all kinds.