Darrah, Lydia, School
Why it's listed
Built in 1926 at Seventeenth and Folsom Streets in Philadelphia's Fairmount section, the Lydia Darrah School was designed under Irwin T. Catharine, who served first as head draftsman and later as Superintendent of School Buildings for the city's School Board. His tenure brought new architectural styles into the city's school designs, and Moderne influence along with greater attention to detail and ornamentation distinguished buildings from his period from earlier schools. The Board had created a Department of Building to design and supervise all new school construction, and its Office of the Architect often produced prototype designs repeated with slight variations. The Darrah School was designated Building Type No. 146 and served as the prototype for an elementary school with a roof-top recreation area. The same design was repeated several times, most notably at the Spring Garden School of 1927 at 12th and Ogden Streets. It is regarded as an important prototype of Moderne school design by Catharine.
Significance in brief: The nomination argues the school is an important example of the design work of Irwin T. Catharine, School Building Superintendent, whose tenure marked a turning point in Philadelphia public school design. It was the prototype for Building Type No. 146, an elementary school with a roof-top recreation area, and the design was repeated with variations, including at Spring Garden School. It is presented as a prototype Moderne design.
Machine-generated summary. This summary was generated by a language model from the official nomination document and has not been reviewed line by line by an editor. It may contain errors. Check the source document before relying on any detail. Source: nomination document (PDF) · National Archives catalog entry. NRHP reference 86003269, listed December 4, 1986. Summary generated October 2026 (model claude-haiku-5-5, prompt v1.1-2026-10-29, confidence medium).
Key facts
| Address | 708--732 N. Seventeenth St., Philadelphia |
|---|---|
| County | Philadelphia |
| Listed | December 4, 1986 |
| Reference number | 86003269 |
| Resource type | Building |
| Architect / builder | Irwin T. Catharine (School Building Superintendent, Office of the Architect) |
| Architectural style | Moderne |
| Areas of significance | Architecture |
| Level of significance | Local |
| Acreage | 0.9 |
| Within district | Fairmount Avenue Historic District |
| Coordinates | 39.96821, -75.16566 (NPS GIS) |
What listing means for this property
For a publicly owned building or structure, listing mainly matters when federal funds, permits or licences are involved: projects then go through Section 106 review so effects on the property are considered. Listing also strengthens applications for preservation grants and, for leased income-producing uses, can enable the federal rehabilitation tax credit.
General information, not legal or tax advice. Rules change; confirm with your State Historic Preservation Office or a qualified adviser.
Sources and further reading
- National Park Service, National Register of Historic Places database (snapshot May 2026), reference 86003269.
- Nomination form (PDF, National Archives) — catalog entry
- Wikipedia article (used for cross-checking only; text not reproduced here)
- Wikidata Q6707607
- This listing as JSON
Last updated October 2026. Found an error? See the editorial policy for how to report it.