Although I'm only vaguely aware of the German laws, I don't think other EU nations' laws differ significantly.

Here's the corresponding law:

The insurer shall not be obligated to effect payment if the policyholder has intentionally and unlawfully caused the loss suffered by the third party.

Source:

Since this was clearly negligence, I think they would be fine. After all, they didn't intend to damage the statue. Gross negligence is still negligence.