Sidney leaders were the first in Ohio to complete such a memorial hall. The Monumental Building was erected with lottery funds and proceeds of bond sales by residents of the village of Sidney and Clinton Township. Shelby County's many veterans were heavily involved in the planning and fundraising for the massive structure. The cornerstone of the building was laid on June 24, 1875. The veterans chose colorful former California 'Forty-Niner' William Van Fossen, First Sergeant of Company C of the 99th Ohio, to represent them at the ceremony. In dedicating the building, he intoned: "Done in the memory of the fallen heroes of Shelby County, the state of Ohio and the town of Sidney June 24th, in the year of our Lord, 1875."

The building was occupied by 1877, complete with an opera house on the third floor. ‘Sgt. Baker,' the statue facing east toward the courtsquare, was installed in December, 1900, after the veterans passed a resolution seeking a statute to "inculcate lessons of patriotism in the present and coming generations." The Monumental Building served as the center of government and cultural life in the county for three-quarters of a century.

With the recently renovated first floor occupied by the Veterans Service Commission, and plans underway for the Sidney Municipal Court to use the remainder of the building, the most important Civil War memorial building in Ohio is experiencing a rebirth as we head into the 21st century.  Author John Fleischman, in an August, 1995 article appearing in "Ohio Magazine," commented that our building is "...renowned as Ohio's first veterans' hall...a gothic revival masterpiece." The author concluded: "Six or so major American wars later, Ohio's surviving veterans' halls march toward the new century in ragged order. Some halls are all spit and polish: others hang by a thread. As a sacred pledge to the honored dead, they represent a standing reproach to the forgetful living."