Gettysburg National Military Park spokeswoman Katie Lawhon said Wednesday that President Obama will not be attending the Dedication Day Ceremony on Nov. 19 at the Gettysburg cemetery, as many had expected. Secretary of the Interior Sally Jewell will represent the administration, she said.

This year’s ceremony is considered particularly special because it comes on the 150th anniversary of President Abraham Lincoln’s delivery of his best-known speech, the Gettysburg Address. The free event will take place at 10 a.m. at the Soldiers’ National Cemetery. Jewell will share key-note speaker honors with Pulitzer Prize-winning historian James McPherson.