Before revision: The oldest real estate brokerage firm was established in 1855 in Chicago, Illinois, and was initially known as "L. D. Olmsted & Co." but is now known as "Baird & Warner .
After revision: The oldest real estate brokerage firm was established in 1855 in Chicago, Illinois, and was initially known as "L D. Olmsted & Co." but is now known as "Baird & Warner .