Llanddwyn island is rich in legends, in particular in its association with Dwynwen. The name Llanddwyn means 'The church of St. Dwynwen'. Dwynwen is the Welsh patron saint of lovers, making her the Welsh equivalent of St. Valentine. The island bears the ruined remains of St Dwynwen's Church (Eglwys Santes Dwynwen). Unusually for churches in that region it has a cruciform floorplan.
Archaeologists examined the ruins of St Dwynwen's in 2011 and again in 2021. The 2021 dig discovered traces of even older buildings below the ruins.
Rosenborg Palace was built in the period 1606-34 as Christian IV’s summerhouse just outside the ramparts of Copenhagen. Christian IV was very fond of the palace and often stayed at the castle when he resided in Copenhagen, and it was here that he died in 1648. After his death, the palace passed to his son King Frederik III, who together with his queen, Sophie Amalie, carried out several types of modernisation.
The last king who used the place as a residence was Frederik IV, and around 1720, Rosenborg was abandoned in favor of Frederiksborg Palace.Through the 1700s, considerable art treasures were collected at Rosenborg Castle, among other things items from the estates of deceased royalty and from Christiansborg after the fire there in 1794.
Soon the idea of a museum arose, and that was realised in 1833, which is The Royal Danish Collection’s official year of establishment.