In 1448, Count Christian I became the king of Denmark. To celebrate the 300th anniversary of Danish rule by the House of Oldenburg, King Frederick V commissioned the design of four identical mansions for noble families. The project in Frederiksstaden – the district is now collectively called Amalienborg – was acquired by the king and queen in 1794 when their Christiansborg Palace was destroyed by fire. The palaces still serve as winter residences for the royal family.