I have been a fan of pipe organs and their music since 1966 or thereabouts when I wrote a term paper on the technology and construction of tracker-type pipe organs. While the casings depicted in these fabulous photos are wonderful, most people would be surprised that the pipes shown are often little more than a facade, the real, music-producing pipes, are hidden behind the facade. While the mechanics differ from one to the other, the whole instrument is a marvel of art and technology. Thanks for the photos and y0ou0r interest in these magnificent instruments.