Dobbin House
Also known as: Diorama of Gettysburg, Inc. Museum
Why it's listed
Built in 1776 by the Reverend Alexander Dobbin, a missionary from the Reformed Presbytery of Ireland, this two-and-a-half-story stone house stands on a 300-acre tract he bought south of Gettysburg in 1775. The seven-bay main block has two brick chimneys, six-over-nine sash windows on the first floor and a box cornice along its length. A one-and-a-half-story kitchen and spring house at the south end was raised to full height around 1810 and placed under the continuous gable roof. Dobbin used the house as his residence and as a classical academy that operated from 1788 to 1810, one of the earliest schools of its kind west of the Susquehanna River. It also served as a theological seminary and occasionally as a church. Dobbin helped lay out parts of Gettysburg and served for a time as a county commissioner. The house was used as a hospital after the Battle of Gettysburg. Its exterior remains largely original, though the interior was substantially altered in the 1940s when it became a museum.
Significance in brief: The nomination argues the house is one of the few remaining eighteenth-century buildings in Gettysburg and one of its oldest standing structures. It is tied to Dobbin's classical academy, which operated from 1788 to 1810 and was one of the earliest of its kind west of the Susquehanna River, and to his roles in the early educational, religious and political life of the community.
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 73001584, listed March 26, 1973. Summary generated October 2026 (model claude-haiku-5-5, prompt v1.1-2026-10-29, confidence medium).
Key facts
| Address | 89 Steinwehr Ave., Gettysburg |
|---|---|
| County | Adams County |
| Listed | March 26, 1973 |
| Reference number | 73001584 |
| Resource type | Building |
| Period of significance | 1776 |
| Areas of significance | Education, Architecture, Religion |
| Level of significance | National |
| Status (as stated in the nomination) | The interior was altered in the 1940s when it was turned into a museum; it was used as a hospital after the Battle of Gettysburg. |
| Acreage | 0.3 |
| Within district | Gettysburg Battlefield Historic District |
| Coordinates | 39.82230, -77.23288 (NPS GIS) |
What listing means for this property
National Register listing is honorary for a privately owned home: it does not by itself restrict what an owner may do with their own money, and it does not require public access. Restrictions come from local landmark or historic-district ordinances, which are separate (how they differ).
Owner-occupied houses are not eligible for the 20% federal rehabilitation tax credit, which applies to income-producing buildings, but many states offer credits for homeowners. Listing also opens the door to preservation easements and to buying a plaque. Start with what listing means for homeowners, renovating a listed house and selling one.
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 73001584.
- Nomination form (PDF, National Archives) — catalog entry
- Wikipedia article (used for cross-checking only; text not reproduced here)
- Wikidata Q5286533
- This listing as JSON
Last updated October 2026. Found an error? See the editorial policy for how to report it.