This is the Rotunda at Ickworth House in Suffolk. It was built by Frederick Hervey, the 4th Earl of Bristol to house his treasures collected whilst touring Europe in the 18th C.
Hervey already owned several houses but this was designed and built as his own private museum. When he died only the rotunda was complete which his wife referred to as 'a moment of folly'. His son went on to complete the two wings of the house adjoining the rotunda.
In the basement is the restored 1930s servants' quarters.
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