High Quality Content by WIKIPEDIA articles! Povey Brothers Studio, also known as Povey Brothers Art Glass Works or Povey Bros. Glass Co., was an American producer of stained glass windows based in Portland, Oregon. The studio was active from 1888 to 1928. As the largest and best known art glass company in Oregon, it produced windows for homes, churches, and commercial buildings throughout the West. When the firm was founded in 1888, it was the only creative window firm in Portland, then a city of 42,000 residents.