Purchase and sale of real estate and plots of land or building land; management of real estate; general contracting; provision of services in the fields of consulting, architecture, planning, construction management and execution of buildings of all kinds; performance of construction work, including all commission transactions; trade in goods of all kinds, in particular construction machinery, equipment, building materials and building materials; provision of services in the construction industry and related industries; participations; acquisition, management and sale of securities; taking up and granting loans; acquisition, development, management and exploitation of patents, licenses and manufacturing processes; provision of guarantees, sureties and other securities.