Acquisition, brokerage, holding, management, rental and sale of real estate; provision of related services; acquisition, management and sale as well as financing of participations in companies at home and abroad; provision of services in the areas of internet and other media; acquisition, holding, management and sale of securities, copyrights, patents and licenses of all kinds; trade in goods of all kinds; financing and provision of guarantees and sureties for subsidiaries and third parties.