to carry out, both on its own account and on behalf of third parties, operations of representation, purchase, sale, brokerage, study, promotion, management, financing, development and construction of real estate, both in Switzerland and abroad; to prepare all plans, projects and financial plans for the execution of construction works; to execute or have executed and supervise, as a general contractor, all construction and renovation works; to import, export and distribute, both on its own account and on behalf of third parties, materials, construction elements and installations, including all accessories and ancillary objects.