The Tu Es Petrus and St. George and the Dragon stained glass windows present in the former St. George’s Church can be directly attributed to one of Meyer & Co.’s most prominent glaziers, Leo Thomas. While Thomas’ contributions are rare within the City of Pittsburgh, his work and the work of his parent studio, George Boos, is well known throughout Western Pennsylvania, the East Coast, and the MidWest. The nearest, and perhaps most numerous, collection of Thomas’s work exists in St. Paul’s Church in Butler, Pa. Here we can find roughly fifty eight windows designed by George Boos’ Studio with under the design supervision of Leo Thomas. It was here, collaborating with the renowned Pittsburgh architect John T. Comes, that both the firm and the designer would receive their first major recognition in the United States.