Complex sentence: An organ recital is a performance of music especially written for the organ, in particular for the pipe organ, which includes church organs, theatre organs, and symphonic organs (also known as concert organs).
Split into simpler sentences: An organ recital is a concert at which music especially written for the organ is played. The music played at such recitals was typically written for pipe organ, which includes church organs, and symphonic organs (also known as concert organs).