An impressive headquarters building for it was designed by William Irving in 1877.

The company expanded into the U.S.[1] It also operated in Sydney and Adelaide.

[2] The company took hits during major conflagrations, such as the San Francisco fire of 1906.

In 1892, British America formed an alliance with the Western Assurance Company, whereby the two companies would retain the distinct identities but would come under the control of a single board of directors.

In 2021, Royal Sun Alliance was acquired by Intact Financial.