A great stumbling block in the understanding of follies is the attempt to define what exactly one is. Must it be useless? Wildly expensive? Weird? One of my favourite summaries comes from Barbara Jones, the first person to study the genre in depth in Follies and Grottoes, published by Constable 65 years ago today
She wrote that a folly ‘is built for pleasure, and pleasure is personal, difficult to define.’