BBDO is a worldwide advertising agency network, with its headquarters in New York City.[2] The agency originated in 1891 with the George Batten Company, and in 1928,[3] through a merger with Barton, Durstine & Osborn (BDO), the agency became Batten, Barton, Durstine & Osborn.[4] With more than 15,000 employees at 289 offices in 81 countries,[1] it is the largest of three global networks of agencies (BBDO, DDB and TBWA) in the portfolio of Omnicom Group.