The Hanover Insurance Group, Inc., established in 1852, has a longstanding presence in the insurance industry, with its headquarters in Worcester, Massachusetts. The company primarily offers property and casualty insurance services and its evolution has been marked by various strategic decisions and transformations. In the mid-90s, the company rechristened itself as Allmerica Property & Casualty Companies and subsequently spun off a new entity, Allmerica Financial Corporation, to broaden its market reach. By 1997, the company was ranked among the top 30 property and casualty insurers in the United States. Shortly after, Allmerica Financial Corporation acquired Allmerica Property & Casualty Companies. In a notable development in 2005, the company decided to revert to its original name, The Hanover Insurance Group, while establishing two divisions, Hanover Insurance and Citizens Insurance. Additionally, its Variable Life and Variable Annuity insurance businesses transitioned into CommonWealth Annuity and Life Insurance Company, operating under the umbrella of Goldman Sachs.