Complex sentence: The Disconto-Gesellschaft (full name: Direction der Disconto-Gesellschaft), with headquarters in Berlin was founded in 1851 was until its 1929 merger into Deutsche Bank one of the largest German banking organizations.
Split into simpler sentences: The Disconto-Gesellschaft (full name: Direction der Disconto-Gesellschaft), with headquarters in Berlin, was founded in 1851. It was, until its 1929 merger into Deutsche Bank, one of the largest German banking organizations.