Question: What insurance company was established in 1797 and occupied an office which now houses a restaurant and flats?

Context paragraphs:
Accident Fund: Accident Fund Insurance Company of America is an American workers' compensation insurance company headquartered in Lansing, Michigan.  The company is a member of AF Group, a premier provider of innovative insurance solutions.  Insurance policies may be issued by any of the following companies within AF Group: Accident Fund Insurance Company of America, Accident Fund National Insurance Company, Accident Fund General Insurance Company, United Wisconsin Insurance Company, Third Coast Insurance Company or CompWest Insurance Company.

Mutual insurance: A mutual insurance company is an insurance company owned entirely by its policyholders. Any profits earned by a mutual insurance company are either retained within the company or rebated to policyholders in the form of dividend distributions or reduced future premiums.  In contrast, a stock insurance company is owned by investors who have purchased company stock; any profits generated by a stock insurance company are distributed to the investors without necessarily benefiting the policyholders.

Commissioner v. First Security Bank of Utah, N.A.: Commissioner v. First Security Bank of Utah, N.A., 405 U.S. 394 (1972), was a Supreme Court case holding that a bank prohibited from doing insurance business did not need to include in gross income the insurance commissions on credit life insurance that the bank referred to an unrelated insurance company.  The case syllabus says that "no share of premium received by life insurance company on business referred to it by commonly controlled national banks could be attributed to banks, and holding company did not utilize its control over banks and insurance company to distort their true net incomes, although banks encouraged lenders to take out insurance and referred them to insurance company, where federal banking laws would have prohibited banks from receiving share in premiums."

Norwich Union: Norwich Union was the name of insurance company Aviva's British arm before June 2009.  It was originally established in 1797.  It was listed on the London Stock Exchange and was once a constituent of the FTSE 100 Index.

Southern Aid and Insurance Company: The Southern Aid and Insurance Company is an insurance company that was founded in 1893, just 28 years after the end of the Civil War, by a group of black men (American men of African ancestry) in Richmond, Virginia.  The purpose was to furnish adequate and affordable insurance protection to African-Americans.  The company was the first chartered insurance company organized by blacks in the United States and had the distinction of being the oldest black owned and operated insurance company in the nation.  It was also the largest African-American insurance company in the United States at one time.  The company's name was later changed to the Southern Aid Society of Virginia which was the forerunner of the Southern Aid Life Insurance Company.

Supreme Life Building: The Supreme Life Building is a historic insurance building located at 3501 S. Dr. Martin Luther King Drive in the Douglas community area of Chicago, Illinois.  Built in 1921, the building served as the headquarters of the Supreme Life Insurance Company, which was founded two years earlier.  The company, originally known as the Liberty Life Insurance Company, was the first African-American owned insurance company in the northern United States.  Since white-owned insurance firms regularly denied black customers life insurance when the firm was founded, the firm played an important role in providing life insurance to Chicago's African-American community.  The company ultimately became the largest African-American owned business in the northern states and became a symbol of the predominantly black Bronzeville neighborhood's economic success from the 1920s to the 1950s.

Ameriprise Auto &amp; Home Insurance: Ameriprise Auto & Home Insurance is an insurance company based in suburban Green Bay, Wisconsin.  The company sells auto, home, condo, renters, umbrella (personal liability) and travel insurance.  Insurance is underwritten by IDS Property Casualty Insurance Company and Ameriprise Insurance Company, each a wholly owned subsidiary of Ameriprise Financial, Inc.  They also partner with various specialty insurance providers to offer coverage for items such as watercraft, ATVs, recreational vehicles and motorcycles.  Ameriprise Auto & Home Insurance is an affinity marketer, relying almost entirely on strategic partnerships to reach customers.  Partners include Costco Wholesale, and Ameriprise Financial.  As of December 2012, Ameriprise Auto & Home Insurance had more than 700,000 policies in force and generated more than $800 million in net written premium.

Princes House, Brighton: Princes House (formerly Norwich Union House) is an office and residential building in the centre of Brighton, part of the English coastal city of Brighton and Hove.  The prominently sited building, an example of Harry Stuart Goodhart-Rendel's "inimitable response to Modernism", was purpose-built as the headquarters of the Brighton & Sussex Building Society, forerunner of the Alliance & Leicester.  The office was later used by Norwich Union, another financial institution, and now houses a restaurant and flats.  The steel-framed structure is clad in red bricks with inlaid mosaicwork, forming a carefully detailed façade, and the corner elevation has an arrangement of brickwork and windows which suggests "the pleated folds of a curtain".  The building is listed it at Grade II for its architectural and historical importance.

Protective Life: Protective Life Corporation is a financial service holding company in Birmingham, Alabama.  The company’s primary subsidiary, Protective Life Insurance Company, was established in 1907 and now markets its products and services in all 50 states.  As of December 31, 2016, the corporation had more than 2,700 employees, annual revenues of $4.48 billion and assets of $75 billion.  In addition to Protective Life Insurance Company, Protective Life Corporation's subsidiaries include West Coast Life Insurance Company, MONY Life Insurance Company, Protective Life And Annuity Insurance Company, ProEquities Inc./Protective Securities, and Lyndon Property Insurance Company.

Physicians Mutual: Physicians Mutual is a privately held insurance company headquartered in Omaha, Nebraska, United States, that consists of Physicians Mutual Insurance Company and Physicians Life Insurance Company.  Founded as Physicians Mutual Insurance Company in 1902 by Edwin E. Elliott, Physicians Mutual began by selling health insurance to medical professionals.  Policies were offered to the general public starting in 1962, and by 1970 the company expanded into life insurance when it founded Physicians Life Insurance Company.  Today the company offers a variety of insurance products, annuities, Medicare, Medigap, Medicare Supplement, Term Life Insurance, Whole Life Insurance, Cancer and funeral pre-planning services.  It holds over US$3 billion in assets and employs over one thousand people.  Robert A. Reed is chief executive officer and president.

Supporting paragraphs: Princes House, Brighton Norwich Union
Answer: Norwich Union