It was quite a photo op. Now social media is taking note.

In case you’re not seeing it on Twitter, President Obama stopped at the José Martí Memorial in Havana on Monday as part of a wreath-laying ceremony. Obama also received a tour of the monument, which honors Martí, the Cuban poet and journalist. It consists of a tower facing the Plaza de la Revolución, with government buildings on the other side.

Take a look at the scene below, as Obama crosses the plaza:

Now look closer:

This is the photo that’s taking off:

A key moment of the ceremony put Obama right in front of a mural of Che Guevara, the communist revolutionary who helped Fidel Castro take control of Cuba during the country’s revolution.

Guevara, sometimes known as “Che,” has become something of a pop icon in the past two decades. (Think of all the college-dorm-room posters.) In Cuba, he is widely venerated as a hero, and worldwide his face remains a symbol of the counterculture. But his legacy is mixed and controversial: Conservative commentators in the United States regularly decry him as a mass murderer and a terrorist.

Reporters were quick to comment on the image:

Univision and a Florida state representative wondered whether the moment was set up by the Cuban government:

Conservatives also seized on the moment: