Barcelona opera house performs to thousands of plants

It's not uncommon for performances at Barcelona's Gran Teatre del Liceu opera house to be sold out, but musicians played to an unusual audience on Monday to mark Spain's lifting of lockdown -- as thousands of plants filled its seats.

 LLUIS GENE/AFP/Getty Images TOPSHOT - The Uceli Quartet perform for an audience made of plants during a concert created by Spanish artist Eugenio Ampudia and that will be later streamed to mark the reopening of the Liceu Grand Theatre in Barcelona on June 22, 2020 following a national lockdown to stop the spread of the novel coronavirus. (Photo by LLUIS GENE / AFP) (Photo by LLUIS GENE/AFP via Getty Images)

The event was the work of conceptual artist Eugenio Ampudia and included a performance from the UceLi Quartet string quartet.

A total of 2,292 plants were packed into the theater, while the string quartet performed Puccini's "Crisantemi," according to a statement from the Liceu.

Although humans were not present in the audience, spectators could watch the "Concierto para el bioceno" via livestream.

The famed opera house said in the statement that it "welcomes and leads a highly symbolic act that defends the value of art, music and nature as a letter of introduction to our return to activity."