The National Mustard Museum is a museum near U.S. 14 in the heart of downtown Middleton, Wisconsin. It boasts a large display of prepared mustards. It is often featured in lists of unusual museums in the United States. The museum was conceived and founded by Barry Levenson, former Assistant Attorney General of Wisconsin. It centers on a mustard collection he began in 1986 while despondent over the failure of his favorite baseball team, the Boston Red Sox, to win the 1986 World Series.