La Mercè is Barcelona’s biggest festival, celebrated to honour the city’s patron saint: concerts, traditions and family activities that you won’t want to miss. It’s celebrated between September 20th and 24th.
WHEN?: September 20th to 24th
More information:
http://merce.bcn.cat/en -official program
http://en.wikipedia.org/wiki/La_Merc%C3%A8
http://www.timeout.com/barcelona/festivals/la-merce-2013
http://www.demotix.com/photo/2785133/pyromusical-closes-la-merce-2013
Other videos:
The pyromusical of La Mercè
Barcelona town hall facade lit-up during La Merce Festival
Video: © Barcelona Cultura
Source: http://vimeo.com/29309957