The mayor of Barcelona, Ada Colau, and Vitali Klitschko, mayor of Ukraine's Kyiv, who will be the guest visitor at the La Mercè festival in 2023, signed a collaboration agreement on Saturday amid the escalation of the war between Russia and Ukraine, which began seven months ago today. FOOTAGE SHOWS THE SIGNING OF THE AGREEMENT BETWEEN THE MAYOR OF BARCELONA, ADA COLAU, AND THE MAYOR OF UKRAINE, VITALI KLITSCHKO, IN BARCELONA, SPAIN.