First established 150 years ago, Chicago Sinai is one of America's oldest Reform Jewish congregations. Its founders were upwardly mobile and civically committed men and women, founders and partners of banks and landmark businesses like Hart Schaffner & Marx, Sears & Roebuck, and the giant meatpacking firm Morris & Co. As explicitly modern Jews, Sinai's members supported and led civic institutions and participated actively in Chicago politics. Perhaps most radically, their Sunday services, introduced in 1874 and still celebrated today, became a hallmark of the congregation.