The crest on the club emblem is the symbol of the flag of Friesland. The flag of Friesland is based on the arms of the 15th century. The stripes and waterlily leaves represent the districts of Friesland. A unique tradition in the Dutch Eredivisie is that the Frisian national anthem is played and sung before every domestic match. UEFA does not allow this tradition in European matches. Nevertheless, the anthem is sung by the supporters anyway.