Thomas Hannah (1867–1935) was a Scottish-American architect based in Pittsburgh in the United States. He is credited with designing the Saint Nicholas Greek Orthodox Cathedral. He also designed the Western Theological Seminary in Pittsburgh. He also designed Midtown Towers, originally known as the Keenan Building and built in 1907. It was built for Colonel Thomas J. Keenan, owner and founder of the Penny Press, which became Pittsburgh Press. The building may have been modeled after the Spreckel Building/ Call Building (1898) of San Francisco. It is decorated with visages of 10 notables associated with Pittsburgh and Pennsylvania, including then-mayor George Guthrie and then-governor Edwin Stuart, in addition to George Washington and Teddy Roosevelt. The dome was once capped with the figure of an eagle in flight.