Here is everything you need to know on the organ http://www.cathedral.org/cathedral/music/greatorgan.shtml The present main console is four manuals of 61 keys each, so the total is 244 manual keys. There are 32 pedal keys.
10,647. 4 manuals, 186 ranks, built by Aeolian Skinner in 1939.
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70 Chaples
The standard organ manual keyboard has 61 keys and the pedal keyboard has 32 keys. Most pipe organs have at least two manual keyboards and large organs have four or more. The number of keys has grown...
The National Cathedral has 231 windows..