Haviland, John h?v?l?nd [key], 1792?1852, American architect, b. Philadelphia. Haviland was noted as a pioneer in prison architecture. His design for the Pennsylvania Eastern State Penitentiary was imitated internationally and heralded prison reform in the 19th cent. Haviland's prisons were characterized by light, airy cells occupied by a single inmate; his designs were soon outmoded by the rise of prison populations.
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