Zuckerberg buys 19th-century castle in Ireland

Meta CEO Mark Zuckerberg has bought a 19th-century Gothic-style castle overlooking a river in the southeast of Ireland, 200km from his company's European headquarters, a spokesman says.

Strancally Castle was built about 1830 on land overlooking the River Blackwater and underwent extensive renovation in 2003, according to a state architectural archive.

The transaction is not listed on the Irish state property price register.

The Irish Times, which first reported the purchase, estimated the property might be worth between 20 million euro and 30 million euro (between $A33 million and $A49 million).

A spokesman for Zuckerberg said he and his family were "excited to continue caring for this historic home and look forward to spending time in Ireland".

Meta employs about 1500 people in Ireland, where a number of US tech multinationals have their European headquarters, in part due to the country's favourable tax regime.