operation of an architectural office as well as any technical and service activities, as well as the execution of all related mandates; study and realization of architectural and other projects, establishment of plans and estimates, coordination of work, site supervision and all approaches and interventions with all administrative or other authorities; consulting in all types of exploitation projects; management of facilities (facility management); purchase, development, operation and sale of all buildings, built or not, and all real estate rights; planning, expertise and management of companies and/or corporations; carrying out any activity in the field of construction (general contractor) (cf. statutes for complete purpose).