Good question. It is a keyboard instrument, like the piano, harpsichord and celesta, but unlike those instruments (which are technically in the percussion family) its tones are produced by air. As an organist myself, I would tend to group it with the keyboard instruments due to what the player him/herself does to produce the sounds.
That depends. If you consider percussion instruments and keyboard instruments to be seperate groups, then the pipe organ belongs in the keyboard group. If you consider percussion and keyboard instruments to be the same group, then the pipe organ is a percussion instrument. It's worth noting that the pipe organ is also technically a woodwind instrument, because the sounds come from wind passing through its pipes.
The pipe organ was invented by the Greek Ctesibius.
The pipe organ is a keyboard instrument.
The instruments most similar to a pipe organ are:Flute (pipe organ has flute pipes of different lengths)Harmonium
Organ pipe coral was created in 1758.
There is none. The pipe organ was not invented. It developed in ancient times. However, there are thousands of patents concerning pipe organ parts.
Organ pipe cacti make no noise.
Moe Pipe Organ Company was created in 1991.
The keyboard instrument with pipes would be the humble pipe organ.
Peragallo Pipe Organ Company was created in 1918.
The first pipe organ, called the hydraulis, was invented in Greece.
Organ pipe mud dauber was created in 1773.