Part of the fortified castle’s masonry collapsed on 30 July. No one was injured and a team from the national monuments service together with an engineering office secured the site.

A first analysis said the collapse of the 14th century wall could be due to heavy rainfall that washed away cement used during 1980s restoration work. This method is no longer used today.

The site is checked regularly for structural safety, the culture ministry said in a statement on Saturday. Further analysis is underway and the wall will be rebuilt later this year, it said.

Luxembourg’s construction sector is currently on collective leave and only urgent works are allowed to go ahead.

The Renaissance wing of the castle remains open to visitors and the ministry said the medieval castle ruins would reopen for visitors in the coming days.

The Beaufort castle is a popular tourist attraction, and a representative of the monuments service told RTL that rebuilding the collapsed wall would cost between €200,000 and €250,000.