Klais Orgelbau
 Klais redirects here. For the Violet-headed Hummingbird see Klais (bird).Orgelbau Klais is a German firm that designs builds and restores pipe organs. It is a family run company founded in 1882 by Johannes Klais senior and is now run by his great-grandson Philipp Klais. The firm is based in Bonn Germany and has completed many large-scale building and restoration projects around the globe in more than a century of organ building.