Which U.S. neoclassical memorial is modeled after the Pantheon?

The U.S. neoclassical memorial modeled after the Pantheon is the Jefferson Memorial in Washington, D.C. Its circular form, domed roof, and classical portico deliberately echo ancient Roman architecture.

Architect John Russell Pope designed the memorial, drawing on the Roman Pantheon as well as Thomas Jefferson’s own interest in classical design. The building occupies the south shore of the Tidal Basin in West Potomac Park and was constructed between 1939 and 1943. President Franklin D. Roosevelt dedicated it on April 13, 1943, the 200th anniversary of Jefferson’s birth.

The open-air memorial has a circular colonnade of 26 Ionic columns and a shallow dome. Inside is a 19-foot bronze statue of Jefferson, installed in 1947, along with inscriptions from his writings. Its design is not a literal copy: it adapts Roman precedent to an American memorial honoring a statesman and author of the Declaration of Independence.

The Lincoln Memorial and Washington Monument are also neoclassical landmarks, but neither is the Pantheon-inspired answer to this question.