PRAGUE (AP) — In a protest about the plight of migrants coming to Europe, Chinese artist and activist Ai Weiwei has wrapped golden thermal blankets around his bronze animal heads meant to recreate the traditional Chinese zodiac.

The series of 12 massive, open-mouthed bronze animal heads known as the Zodiac Heads are on display in front the National Gallery's Trade Fair Palace in Prague. They are part of an exhibition, officially opening late Friday, to mark the gallery's 220th anniversary.

Ai describes his display as "a gesture...in defending the dignity of the refugees."

The heads has been displayed in New York City and elsewhere, but Aid Ai says it's his first time to see it due to various travel restrictions.