Chicago XI is the 11th album by American rock band Chicago and was released in 1977. As the successor to Chicago X, the album marked the end of an era for Chicago in more ways than one. This would be the last Chicago album to feature guitarist, and founding member, Terry Kath (On January 23, 1978, a few short months after Chicago XI's release, Terry Kath, regarded by many as the soul of Chicago, accidentally and fatally shot himself during a party at roadie Don Johnson's house), and the last Chicago album to be produced by James William Guercio.