Page last updated at 10:27 GMT, Monday, 20 April 2009 11:27 UK

Secrets of castle to be unlocked

Archaeologist at Oxford castle
Archaeologists are scanning the ground using radar

Archaeologists are using radar to try and discover what is hidden under the mound of Oxford castle.

Researchers hope to get a picture of what the original structure looked like during a month long project.

Subsidence work carried out last year uncovered evidence a ten-sided tower once stood on the site.

The ground will be scanned and then excavated in July and the results put on display. The Oxford Preservation Trust is behind the work.

Debbie Dance, trust director, said: "This is a fantastic chance to find out more about the original castle.

"We are delighted to have the chance to share the excitement with schools and young people bringing history and science together."

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