The main organ in the Frankfurt Cathedral is huge. Not so much when you see it in relation to the cathedral itself, though. I can never stop marveling about the sheer largeness of those gothic churches.
While the cathedral in Frankfurt doesn’t belong to the biggest churches in Germany, it still is big. It never was a real cathedral (meaning the church of a bishop), by the way. But still it is one of the most important churches in the country. After 1356 all kings of the Holy Roman (=German) Empire were elected here, after 1562 they also were crowned as Emperor in this cathedral. One of the most important places, if not the most important place in German history from that time until 1806, when the Empire dissolved.
Oh, and: The organ is the seventh biggest one in Germany, so it is anything but small.
Photo data: Pentax K20D, Pentax DA 18-55 mm ALII lens, f5.6, ISO 400, 4 handheld exposures between 1/125 and 1/6 second, combined to HDR and tonemapped in Photoshop.