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Inside Wytham Abbey, the £15 Million Castle Effective Altruism Must Sell

It has 27 bedrooms and 18 bathrooms and has connections to both Queen Elizabeth I and Silicon Valley billionaires.

Wytham Abbey, just three miles west of Oxford, is on sale for £15 million ($18.7 million). 

Source: Savills

The manor house cheekily known as the Effective Altruism Castle is finally hitting the market—with its sellers willing to take what amounts to a loss.

Effective Ventures Foundation bought Wytham Abbey in April 2022 for £14.9 million ($18.6 million) with grants from Open Philanthropy, whose funders include billionaire Facebook co-founder Dustin Moskovitz. The purchase initially stirred controversy that a charity dedicated to the most efficient use of money for the maximum good was buying one of the finest manor homes in England—and later for Effective Ventures’ connections to crypto swindler Sam Bankman-Fried.