So, so, tragic. This architectural gem has been a significant part of western civilization for centuries.

A fire has broken out at the famous Notre-Dame cathedral in Paris and has spread rapidly across the building.

The cause is not yet clear, but officials say that it could be linked to renovation work.

A major operation to tackle the blaze is under way at the 850-year-old Gothic building, but the cathedral’s spire and roof have collapsed.

You can see the images here. The damage is extensive.