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National Register of Historic Places

Mast Castle

Also known as Mast Mansion; Ohio Knights of Pythias Home for the Aged

On the National Register since 20260 years
Listed 2026Springfield
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About

About Mast Castle

Mast Castle, at 901 West High Street, was added to the National Register of Historic Places on May 1, 2026. The Register lists it for its architecture, at the local level. The listing covers 6.1 acres.

Memories of Mast Castle

The record says what it is. Neighbors know what it means.

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Questions about Mast Castle

Is Mast Castle on the National Register of Historic Places?

Yes. It was added on May 1, 2026 (Register number 100012954).

Is Mast Castle a National Historic Landmark?

No. It is on the National Register; Ohio has 73 National Historic Landmarks.

Can you visit Mast Castle?

Our record doesn’t say whether it is open to visitors. Many listed buildings are private, so it may only be seen from the street.

Sources: National Park Service, National Register of Historic Places (05/22/2026). Map tiles © OpenStreetMap contributors.