The Barnes and Thornburg Building is a high rise in Indianapolis, Indiana originally known as the Merchants National Bank Building. In 1905, the Merchants National Bank and Trust Company engaged the architectural firm of D. H. Burnham & Company of Chicago to design a new bank headquarters on the southeastern corner of the Washington and Meridian streets, the most important intersection in Indianapolis. Initial occupancy of the lower floors took place in 1908, while the upper floors were not completed until 1912.