Complex sentence: At the end of his final concert at the "Olympia" he bid his audience an emotional farewell, and then, following the death of his mother in 1979, he shut himself away from the world for the next two years.
Split into simpler sentences: At the end of his final concert at the "Olympia" he bade his audience an emotional farewell. Following the death of his mother in 1979, he shut himself away from the world for the next two years.