"When Barcelona's Liceu opera opened on Monday for its first concert since mid-March, it did so to a full house -- of plants. The Gran Teatre del Liceu filled its 2,292 seats with plants for a performance by the UceLi Quartet, which it called a prelude to its 2020-'21 season. The string quartet serenaded its leafy audience with Giacomo Puccini's Crisantemi, in a performance that was also made available to human listeners via livestream. 'After a strange, painful period, the creator, the Liceu's artistic director and the curator Blanca de la Torre offer us a different perspective for our return to activity, a perspective that brings us closer to something as essential as our relationship with nature,' according to a release on the Liceu's website. The plants came from local nurseries and will be donated along with a certificate from the artist to 2,292 health care professionals, specifically at the Hospital Clnic of Barcelona," KPCC Radio in southern California reports.