Saint Eulalia’s flag or pennon is the historical flag of Barcelona and one of its main symbols. Over a maroon background it is represented the figure of the city’s patron through a saltire, its main attribute. Early twentieth Century, the flag was held on City Council balcony every February 12, Saint Eulalia of Barcelona’s Day. The ensign, usually allocated in Tercentenary room of the City House, was shown in solemn acts, both lay and religious, as well as in the calls to citizens to defend the city against foreign enemies.