When the building (it’s not a castle) was bought (in early 2021), the name of the organisation that bought it was CEA. The change at some point after that to Effective Ventures. It’s unclear how much governance-wise a separate ‘umbrella CEA’ existed to a ‘core CEA’ at the point of the purchase, but even now, CEA does not seem to have a board separate from Effective Ventures, and it’s ultimately the same people that hare fully responsible and it’s legally the same organisation that people donated to (unclear what kind of restrictions could put on their donations at which point in time). Note that this is different from your Google/Deepmind example, as both of these are separte legal entities (albeit owned by the same umbrella company).
When the building (it’s not a castle) was bought (in early 2021), the name of the organisation that bought it was CEA. The change at some point after that to Effective Ventures. It’s unclear how much governance-wise a separate ‘umbrella CEA’ existed to a ‘core CEA’ at the point of the purchase, but even now, CEA does not seem to have a board separate from Effective Ventures, and it’s ultimately the same people that hare fully responsible and it’s legally the same organisation that people donated to (unclear what kind of restrictions could put on their donations at which point in time). Note that this is different from your Google/Deepmind example, as both of these are separte legal entities (albeit owned by the same umbrella company).