On June 1, 1953, Hessische Landesbank Girozentrale arose from the merger of Hessische Landesbank Darmstadt Girozentrale (founded in 1940), Nassauische Landesbank Wiesbaden (founded in 1940) and Landeskreditkasse zu Kassel (founded in 1832). In the 1970s, a financial scandal in relation to Tibor Rosenbaum brought Hessische Landesbank into serious difficulties. On July 1, 1992, a state treaty between Hesse and Thuringia on uniting the savings banks organizations of the two federal states brought about the creation of a joint Landesbank. As a result, it was the first Landesbank to operate outside a single federal state’s boundary. In the year 2005, Helaba acquired Frankfurter Sparkasse and thereby entered further into private customer business, which it had already conducted through its Darmstadt Branch and at its Kassel location through Landeskreditkasse zu Kassel.