Nationally renowned opera singer Simon Estes is coming to Knoxville on December 1, at the new Knoxville Performing Arts Center. Knoxville Choir Director Jackie Duffy says that the concert will also feature Knoxville’s Middle School and High School choirs, and the performance will culminate with “The Battle Hymn of the Republic.” Tickets can be purchased at The Next Chapter, at the Iowa State Savings Bank and on-line at www.seatyourself.biz, under the Buy Tickets tab.