First Republic Bank Corporation was an American bank based in Texas. Founded as the Guaranty Bank and Trust Company in 1920, in 1922 it assumed the name Republic National Bank of Dallas. Afterwards the bank acquired several banks and invested in others, and changed its name several times. By 1948 Republic had grown to become the largest bank in Texas. The bank failed in 1988, during the savings and loan crisis. It was acquired by NCNB Corporation in 1988. As a result of a series of mergers over the next two decades, most of what was once First Republic is now part of Bank of America.