At one time the great state of Illinois had at least 415 round and multi-sided barns, the most of any state in the Union. Unfortunately, only 65 of these fine structures remain, which is a loss of 84 percent. This book is the complete history of these wonderful buildings as it delves into the designers, architects, builders, farmers, entrepreneurs and promoters of these fine structures. The book contains more than five hundred modern and historical photographs, statistical charts and tables. The contents of this book will satisfy the wants of any reader interested in agricultural vernacular architecture.