Princess Märtha Louise arrived at Rikshospitalet in Oslo in the late afternoon on Tuesday and departed after spending a few hours at the facility. ^[1] King Haakon and Queen Mette-Marit of Norway visited Rikshospitalet in Oslo on a Tuesday afternoon, with the King arriving around 17:00 and leaving alone at 18:22 before returning at 21:00 to depart with the Queen. ^[2] The Royal Palace stated that Queen Mette-Marit has experienced complications since her lung transplant in June, requiring observation throughout the day. ^[3] The specific reason for Princess Märtha Louise's visit to Rikshospitalet is currently unknown. ^[4] Are Holm, a lung specialist at Rikshospitalet, stated in a press release that complications are not unusual after a lung transplant and that the Queen must be observed throughout the day. ^[5] Queen Mette-Marit canceled her attendance at the King's oath of office ceremony at the Stortinget due to complications following her lung transplant in the summer. ^[6] Queen Mette-Marit was diagnosed with chronic lung disease, pulmonary fibrosis, in 2018 and underwent a successful lung transplant on June 17, with discharge instructions to undergo rehabilitation for the next six months. ^[7]