Queen Sonja, Crown Princess Mette-Marit and Princess Ingrid Alexandra of Norway at the Slottsparken in Oslo, on October 19, 2017, to reveal two new sculptures in Princess Ingrid Alexandra's sculpture park Photo: Albert Nieboer / Netherlands OUT / Point De Vue Out NO WIRE SERVICE Photo: Albert Nieboer/RoyalPress/dpa

Queen Sonja, Crown Princess Mette-Marit and Princess Ingrid Alexandra of Norway at the Slottsparken in Oslo, on October 19, 2017, to reveal two new sculptures in Princess Ingrid Alexandra's sculpture park Photo: Albert Nieboer / Netherlands OUT / Point De Vue Out NO WIRE SERVICE Photo: Albert Nieboer/RoyalPress/dpa

Queen Sonja, Crown Princess Mette-Marit and Princess Ingrid Alexandra of Norway at the Slottsparken in Oslo, on October 19, 2017, to reveal two new sculptures in Princess Ingrid Alexandra's sculpture park Photo: Albert Nieboer / Netherlands OUT / Point De Vue Out NO WIRE SERVICE Photo: Albert Nieboer/RoyalPress/dpa

Queen Sonja, Crown Princess Mette-Marit and Princess Ingrid Alexandra of Norway at the Slottsparken in Oslo, on October 19, 2017, to reveal two new sculptures in Princess Ingrid Alexandra's sculpture park Photo: Albert Nieboer / Netherlands OUT / Point De Vue Out NO WIRE SERVICE Photo: Albert Nieboer/RoyalPress/dpa

Queen Sonja, Crown Princess Mette-Marit and Princess Ingrid Alexandra of Norway at the Slottsparken in Oslo, on October 19, 2017, to reveal two new sculptures in Princess Ingrid Alexandra's sculpture park Photo: Albert Nieboer / Netherlands OUT / Point De Vue Out NO WIRE SERVICE Photo: Albert Nieboer/RoyalPress/dpa

Queen Sonja, Crown Princess Mette-Marit and Princess Ingrid Alexandra of Norway at the Slottsparken in Oslo, on October 19, 2017, to reveal two new sculptures in Princess Ingrid Alexandra's sculpture park Photo: Albert Nieboer / Netherlands OUT / Point De Vue Out NO WIRE SERVICE Photo: Albert Nieboer/RoyalPress/dpa

Queen Sonja, Crown Princess Mette-Marit and Princess Ingrid Alexandra of Norway at the Slottsparken in Oslo, on October 19, 2017, to reveal two new sculptures in Princess Ingrid Alexandra's sculpture park Photo: Albert Nieboer / Netherlands OUT / Point De Vue Out NO WIRE SERVICE Photo: Albert Nieboer/RoyalPress/dpa

Queen Sonja, Crown Princess Mette-Marit and Princess Ingrid Alexandra of Norway at the Slottsparken in Oslo, on October 19, 2017, to reveal two new sculptures in Princess Ingrid Alexandra's sculpture park Photo: Albert Nieboer / Netherlands OUT / Point De Vue Out NO WIRE SERVICE Photo: Albert Nieboer/RoyalPress/dpa

Queen Sonja, Crown Princess Mette-Marit and Princess Ingrid Alexandra of Norway at the Slottsparken in Oslo, on October 19, 2017, to reveal two new sculptures in Princess Ingrid Alexandra's sculpture park Photo: Albert Nieboer / Netherlands OUT / Point De Vue Out NO WIRE SERVICE Photo: Albert Nieboer/RoyalPress/dpa

Queen Sonja, Crown Princess Mette-Marit and Princess Ingrid Alexandra of Norway at the Slottsparken in Oslo, on October 19, 2017, to reveal two new sculptures in Princess Ingrid Alexandra's sculpture park Photo: Albert Nieboer / Netherlands OUT / Point De Vue Out NO WIRE SERVICE Photo: Albert Nieboer/RoyalPress/dpa

Queen Sonja, Crown Princess Mette-Marit and Princess Ingrid Alexandra of Norway at the Slottsparken in Oslo, on October 19, 2017, to reveal two new sculptures in Princess Ingrid Alexandra's sculpture park Photo: Albert Nieboer / Netherlands OUT / Point De Vue Out NO WIRE SERVICE Photo: Albert Nieboer/RoyalPress/dpa

Queen Sonja, Crown Princess Mette-Marit and Princess Ingrid Alexandra of Norway at the Slottsparken in Oslo, on October 19, 2017, to reveal two new sculptures in Princess Ingrid Alexandra's sculpture park Photo: Albert Nieboer / Netherlands OUT / Point De Vue Out NO WIRE SERVICE Photo: Albert Nieboer/RoyalPress/dpa

Queen Sonja and Princess Ingrid Alexandra of Norway at the Slottsparken in Oslo, on October 19, 2017, to reveal two new sculptures in Princess Ingrid Alexandra's sculpture park Photo: Albert Nieboer / Netherlands OUT / Point De Vue Out NO WIRE SERVICE Photo: Albert Nieboer/RoyalPress/dpa

Queen Sonja, Crown Princess Mette-Marit and Princess Ingrid Alexandra of Norway at the Slottsparken in Oslo, on October 19, 2017, to reveal two new sculptures in Princess Ingrid Alexandra's sculpture park Photo: Albert Nieboer / Netherlands OUT / Point De Vue Out NO WIRE SERVICE Photo: Albert Nieboer/RoyalPress/dpa

Queen Sonja, Crown Princess Mette-Marit and Princess Ingrid Alexandra of Norway at the Slottsparken in Oslo, on October 19, 2017, to reveal two new sculptures in Princess Ingrid Alexandra's sculpture park Photo: Albert Nieboer / Netherlands OUT / Point De Vue Out NO WIRE SERVICE Photo: Albert Nieboer/RoyalPress/dpa

Queen Sonja and Princess Ingrid Alexandra of Norway at the Slottsparken in Oslo, on October 19, 2017, to reveal two new sculptures in Princess Ingrid Alexandra's sculpture park Photo: Albert Nieboer / Netherlands OUT / Point De Vue Out NO WIRE SERVICE Photo: Albert Nieboer/RoyalPress/dpa

Queen Sonja and Princess Ingrid Alexandra of Norway at the Slottsparken in Oslo, on October 19, 2017, to reveal two new sculptures in Princess Ingrid Alexandra's sculpture park Photo: Albert Nieboer / Netherlands OUT / Point De Vue Out NO WIRE SERVICE Photo: Albert Nieboer/RoyalPress/dpa