During the 16th and 17th centuries, dovecotes were built as apartment blocks for pigeons to be eaten by the nobility. Each dovecote had its own unique flair, showcasing the imagination of craftsmen. Pigeons were a primary meat source before root vegetables arrived in Britain. Dovecotes were a symbol of the elite, with bigger and more ornate structures signifying societal status. The introduction of root vegetables and relaxation of building restrictions led to the decline of dovecotes. Today, many dovecotes still exist, but pigeons have lost their prestigious status. France, especially Brittany, is a prime destination to see these architectural wonders.
https://www.atlasobscura.com/articles/dovecotes