Many years ago, when we visited Barcelona, Spain, we were awestruck by the Basilica and Temple of the Sagrada Familia. We had never seen anything remotely like it, and it dominated the city’s skyline. Here is a brief description:

Often mistaken for Barcelona’s cathedral, the breathtaking Basilica and Expiatory Temple of the Holy Family, paid for entirely by private donations and sales of tickets to the 2.5 million people who visit it each year, is unlikely to be finished before 2026. Given that construction began in 1882, this is clearly the work not just of a singular and devoutly religious architect, but of several determined generations of dedicated professionals and enthusiasts.

Looking for all the world like a cluster of gigantic stone termites’ nest, a colossal vegetable patch, a gingerbread house baked by the wickedest witch of all or perhaps a petrified forest, this hugely ambitious church has confounded architects, critics and historians ever since its unprecedented shape became apparent soon after World War I.