Prince William, Duke of Cambridge visits the Weston Library on May 11, 2016 in Oxford, England.

Prince William, Duke of Cambridge visits the Weston Library on May 11, 2016 in Oxford, England.

Prince William, Duke of Cambridge visits the Blavatnik School of Government on May 11, 2016 in Oxford, England. 

Prince William, Duke of Cambridge visits the Blavatnik School of Government on May 11, 2016 in Oxford, England.

Prince William, Duke of Cambridge visits the Blavatnik School of Government on May 11, 2016 in Oxford, England.

Prince William, Duke of Cambridge visits the Blavatnik School of Government on May 11, 2016 in Oxford, England. 

Prince William, The Duke of Cambridge, arrives at the Weston Library for a tour and to officially reopen it after a substantial remodeling project at Oxford, where he has been invited to see the results of three major investment projects, in United Kingdom on May 11, 2016.

Prince William, The Duke of Cambridge, arrives at the Weston Library for a tour and to officially reopen it after a substantial remodeling project at Oxford, where he has been invited to see the results of three major investment projects, in United Kingdom on May 11, 2016.

 Prince William, The Duke of Cambridge, arrives at the Weston Library for a tour and to officially reopen it after a substantial remodeling project at Oxford, where he has been invited to see the results of three major investment projects, in United Kingdom on May 11, 2016.

Prince William, The Duke of Cambridge, arrives at the Weston Library for a tour and to officially reopen it after a substantial remodeling project at Oxford, where he has been invited to see the results of three major investment projects, in United Kingdom on May 11, 2016.

Prince William, The Duke of Cambridge, arrives at the Weston Library for a tour and to officially reopen it after a substantial remodeling project at Oxford, where he has been invited to see the results of three major investment projects, in United Kingdom on May 11, 2016.

Prince William, The Duke of Cambridge, arrives at the Weston Library for a tour and to officially reopen it after a substantial remodeling project at Oxford, where he has been invited to see the results of three major investment projects, in United Kingdom on May 11, 2016.

Prince William, The Duke of Cambridge, arrives at the Weston Library for a tour and to officially reopen it after a substantial remodeling project at Oxford, where he has been invited to see the results of three major investment projects, in United Kingdom on May 11, 2016.

Prince William, The Duke of Cambridge, arrives at the Weston Library for a tour and to officially reopen it after a substantial remodeling project at Oxford, where he has been invited to see the results of three major investment projects, in United Kingdom on May 11, 2016.

 Prince William, Duke of Cambridge leaves the Blavatnik School of Government on May 11, 2016 in Oxford, England. 

 Prince William, Duke of Cambridge leaves the Blavatnik School of Government on May 11, 2016 in Oxford, England. 

Prince William, Duke of Cambridge leaves the Blavatnik School of Government on May 11, 2016 in Oxford, England.

Prince William, Duke of Cambridge leaves the Blavatnik School of Government on May 11, 2016 in Oxford, England. 

Prince William, Duke of Cambridge leaves the Blavatnik School of Government on May 11, 2016 in Oxford, England. 

Prince William, The Duke of Cambridge, arrives at the Weston Library for a tour and to officially reopen it after a substantial remodeling project at Oxford, where he has been invited to see the results of three major investment projects, in United Kingdom on May 11, 2016.

Prince William, The Duke of Cambridge, arrives at the Weston Library for a tour and to officially reopen it after a substantial remodeling project at Oxford, where he has been invited to see the results of three major investment projects, in United Kingdom on May 11, 2016.

Prince William, The Duke of Cambridge gestures as he visits Oxford where he has been invited to see the results of three major investment projects in United Kingdom on May 11, 2016. The Duke departs from the Blavatnik School of Government.

Prince William, The Duke of Cambridge visits Oxford where he has been invited to see the results of three major investment projects in United Kingdom on May 11, 2016. The Duke departs from the Blavatnik School of Government.

 Prince William, The Duke of Cambridge, arrives at the Weston Library for a tour and to officially reopen it after a substantial remodeling project at Oxford, where he has been invited to see the results of three major investment projects, in United Kingdom on May 11, 2016.

Prince William, The Duke of Cambridge gestures as he visits Oxford where he has been invited to see the results of three major investment projects in United Kingdom on May 11, 2016. The Duke departs from the Blavatnik School of Government.