The Montgomery County Courthouse (MCC), built in 1847, is a historic Greek Revival building located in Dayton, Ohio.

The limestone building, modeled on the 5th century BC Temple of Hephaestus in Athens, Greece, is the nation's best surviving example of a Greek Revival-style courthouse.

[citation needed] The design was suggested by Dayton citizen Horace Pease, who had a book of sketches of the Acropolis in Athens which showed the Temple of Theseus, which he admired.

Pease showed it to the Montgomery County Commissioners, who also were favorably impressed, and agreed it would be a good model for their new Courthouse.

They hired architect Howard Daniels of New York to draw the plans in which he captured the form and beauty of the ancient Greek temple.