Operation of an architectural office, in particular planning and realization of buildings as well as provision of services of all kinds as general and total contractor, including purchase and sale, development, brokerage and management of properties. May establish branches abroad, participate in other companies, acquire or establish them, and conduct all commercial, financial or other business directly or indirectly related to the company's purpose, grant loans or other financing to its direct or indirect parent companies and their direct or indirect subsidiaries, with or without consideration, and provide security of all kinds for the liabilities of such group companies, including guarantees, pledges and fiduciary transfers of the company's assets, as well as acquire and sell properties.