[508-540 Walnut Street; "Penn Mutual Life Insurance Company Building"]
512-40 Walnut Street
Philadelphia Historical Commission Files, Philadelphia Historical Commission.
Local ID #: 31099-34
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- Building Type: office building
- Client: Penn Mutual Life Insurance Company
520 WALNUT ST
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Historic Registrations and Surveys
Philadelphia Register of Historic Places
-- 09/25/1962; 03/10/1999
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