Anyone visiting the Belvoir Castle website on Friday would have been greeted with a black page bearing the Algerian flag.
The website had been hacked late last week with Arabic text placed instead of the usual content. IT experts have since struggled to repair the homepage although much of the rest of the site had been restored.
A spokesman was baffled as to why they had been targeted.
“It happened on Friday afternoon and we’ve had our IT chap working to try to fix it.
“We’ve nothing to do with Israel or the Middle East, I just help to organise the teddy bears’ picnic.”