Beginning in the 1920s and accelerating two decades later, many Episcopalians left Philadelphia altogether. New congregations appeared almost overnight in suburbs like Newtown Square (St. Alban's, 1922), Gladwyne (St. Christopher's, 1949), Levittown (St. Paul's, 1953), and Maple Glen (St. Matthews, 1967). Others experience unprecedented growth in the 1950s (Redeemer, Bryn Mawr, 1851). Bishop Oliver J. Hart (1943-1963) wrestled with the implications of suburbanization. Growth was good, he believed, but its benefits were not unmitigated. It stretched the resources of the Diocese. Congregations outside the city did not always empathize with the social and economic problems of their urban brethren.