Nestled near the ruins of Fonthill Abbey in the English countryside, Upper Lawn Pavilion — also known as the Solar Pavilion — is a modest yet profound architectural experiment by Alison and Peter Smithson. Built between 1959 and 1962 as a weekend retreat and laboratory for ideas, the pavilion embodies their ethos of economy, material honesty, and respect for context, reflecting the pioneering spirit of New Brutalism.