sentences:  Nielsen's songs retain an important place in Danish culture and education.The musicologist Niels Krabbe describes the popular image of Nielsen in Denmark as being like "the ugly duckling syndrome" – a reference to the tale of the Danish writer Hans Christian Andersen – whereby "a poor boy ... passing through adversity and frugality ... marches into Copenhagen and ... comes to conquer the position as the uncrowned King".Thus while outside Denmark Nielsen is largely thought of as the composer of orchestral music and the opera "Maskarade", in his own country he is more of a national symbol.