<p>Revelers joined the annual Le Merce Festival, the biggest street celebration in Barcelona, which began on Friday, September 21 and was scheduled to end on Monday, September 24.</p><p>The festival is called</a> Les Festes de la Merce in the Catalan language and Fiestas de la Merce in Spanish.</p><p>La Merce Festival was declared a holiday in 1871, is to observe the Roman Catholic feast day of Our Lady of Mercy. Credit: Odin Pernas Sanz via Storyful</p><br />
