Ogans are the most popular musical instruments used in Churches. There are one kind of organ called the pipe organ. What makes pipe organ so special is that the size is very large beside the heavy sound it could generate. Without using electronic amplifier the sound is loud enough to cover the whole building of the Church. The referbarating pipes they use to construct the organ make it's size very large. The longest pipe
is about 6 meter, with a diameter of about 20 cm.
