In brief
The large residence is perceived through its location in a designed landscape.
Useful to know
Blenheim Palace near Oxford was built in 1705-1722. UNESCO also pays attention to the park, shaped by Lancelot "Capebility" Brown. The building and landscape are related, but not the same creative contribution. [1]
Compare a general view of the park with the facade up close. The distance changes the way the scale is read: the far view arranges the large volumes, and the close one reveals the entrance and the details. It is an observation exercise; it does not require us to call the whole ensemble the work of an architect.
Sources
For further detail and to check the information: