COPENHAGEN, Denmark (AP) — A fire raged through one of Copenhagen’s oldest buildings on Tuesday, causing the collapse of the iconic spire from the 17th-century Old Stock Exchange as passersby rushed to help emergency services save priceless paintings and other valuables.

Danish Culture Minister Jakob Engel-Schmidt said it was “touching” to see how many people lent their hand “to save art treasures and iconic images from the burning building.” One man jumped off his bicycle on his way to work to help in the effort.

Brian Mikkelsen, chief of the Danish Chamber of Commerce, which is headquartered in the Old Stock Exchange, and his staff were seen scrolling through a binder with photos of paintings to be saved. They were carried to the nearby parliament and Danish National Archives, around the corner from the burning building.

“It is a national disaster,” Mikkelsen told reporters.

The fire began Tuesday morning in the copper roof of the Old Stock Exchange, or Boersen, spread to much of the building and the roof, parts of which also collapsed, and destroyed the building’s interior, said firefighters spokesman Jakob Vedsted Andersen.

Firefighters who reportedly pumped water from the nearby canal were seen spraying water through the doorway of the Old Stock Exchange’s gilded hall that is used for gala dinners, conferences, parties and other events and where many of the paintings hung.

The cause of the fire was not immediately known.

The building, which is situated next to the Christiansborg Palace where the parliament sits, is a popular tourist attraction and has been photographed millions of times. Its distinctive spire, in the shape of the tails of four dragons twined together, reached a height of 56 meters (184 feet).

Huge billows of smoke rose over downtown Copenhagen and people were seen rushing inside the building to save paintings. The plume could be seen from southern Sweden, which is separated by a narrow waterway.

Ambulances were at the scene but there were no reports of casualties. A spokesman for the company working on renovating the building said the carpenters who worked on the roof had all come out.

Up to 90 members of an army unit were also deployed from a nearby base to cordon off the area and “secure valuables,” Denmark’s armed forces said.

King Frederik wrote on Instagram that “they woke up to a sad sight” of “an important part of our architectural heritage” being destroyed by the flames.

Prime Minister Mette Frederiksen wrote that “irreplaceable cultural heritage” and ”a piece of Danish history is on fire.”

“It hurts to see,” Frederiksen wrote on Instagram.

The building and the spire had been encased in scaffolding, which later collapsed in the fire. The roof, masonry, sandstone and spire of Boersen — built in 1615 and considered a leading example of Dutch Renaissance style in Denmark — was being renovated, said the Chamber of Commerce, which moved into the building after Copenhagen’s stock exchange left in 1974.

The adjacent Christiansborg Palace has burned down on several occasions, and most recently in 1990 a fire broke out in an annex of the Danish parliament, known as Proviantgaarden. However, the Old Stock Exchange survived unscathed.

That annex, which lies in the block behind the Old Stock Exchange, was evacuated as a precaution, as were different ministries in the street behind the burning building.

Police said on the social media platform X that a main road in Copenhagen was closed and people should expect the area to be cordoned off for some time. Several bus lines were rerouted and Danish media reported huge traffic jams in the surrounding area.