 To make room for corporate headquarters, employee parking and housing, blocks of single family homes were gradually replaced by apartment buildings with small one-bedroom and efficiency apartments.Aetna remains as a major fixture along Farmington Avenue and recently moved more than 3,400 of their Middletown employees to its Hartford campus.With many dating from the 19th-century residential period, a number of significant religious institutions are located in the neighborhood, including the Asylum Hill Congregational Church (1864) (where Mark Twain's good friend Joseph Twichell was minister for nearly 50 years) and the Trinity Episcopal Church (1890s).