AMRO Bank (Amsterdamsche en Rotterdamsche Bank) was a major Dutch bank that was created from the merger of the Amsterdamsche Bank and the Rotterdamsche Bank in 1964. Its name comes from the first two letters of the two originating banks. It went on to become one of the two main predecessors to ABN AMRO bank when it agreed to merge with Algemene Bank Nederland (ABN) in 1991. The bank could trace its roots back to at least 1765 and both the Amsterdamsche Bank and Rotterdamsche Bank had a long complex history.