The Octagon House, National Historic Landmark in United States
The Octagon House is a single-family detached home designed by William Thornton in Washington, D.C.
This house was constructed in 1799 and has stood as a historical monument since then.
Currently, it's serving as a museum showcasing artifacts from the late 18th century.
Visitors can explore this National Register of Historic Places listed place and learn about its rich history.
One of the unique features is its octagonal shape which is not common in traditional architecture.
Location: Washington, D.C.
Inception: 1799
Architect: William Thornton
Architectural style: Federal architecture
Floors above the ground: 3
Material: brick
Address: 1799 New York Avenue NW, Washington, DC 20006
Source: Wikimedia