At Facebook of the Royal Armoury
"Today's date: August 18, 1744 the Prussian princess Lovisa Ulrika and the Swedish crown prince Adolf Fredrik married. About 300 guests had gathered in the Hall of State at Drottningholm Paalce to attend the wedding ceremony. The king, Fredrik I, led Lovisa Ulrika into the wedding hall ... After the wedding an evening meal awaited in the large dining room and during the whole dinner the royal court orchestra played in an adjoining room. The music was the famous Drottningholm music composed especially for the wedding of Johan Helmich Roman.
The day before, the bride and groom had arrived at Drottningholm under cannon salute with a newly built sloop, accompanied by eight flag-adorned ships. During the journey over, Lovisa Ulrika dropped her fan so that it fell into small pieces. The future groom collected the pieces and handed them out as a souvenir to those present and joked that an order would be instituted in memory of the event. So it was, L'Ordre de l'harmonie, Solfjädersorden, was very rightly instituted but only awarded for a short period. The Order is preserved in the Collection of the Royal Armoury."