Bexar (pronounced Bear) County Courthouse located in San Antonio, Texas needed to save energy. This building was built in 1896 and is the largest courthouse in Texas with more than a thousand windows. The architect needed a product that wouldn’t change the architectural integrity of the building but that would reduce the air infiltration and provide insulation. The Texas Historical Commission recommended Magnetite Windows. As you can see from this picture, there were many special shapes, including arched windows, elliptical windows and some very large plate glass openings.