King Felipe VI of Spain led a ceremony in Barcelona on Friday to pay tribute to the 16 people killed in terrorist attacks there one year ago, an event that was also designed to show harmony amid a bitter dispute over independence for the region of Catalonia.

On Aug. 17, 2017, a van swerved down Las Ramblas, a famous Barcelona boulevard, leaving behind a trail of bodies. One person was then killed in the driver’s getaway, and another in a second attack at a nearby seaside resort. More than 100 people were wounded.