The Three Horseshoes is the oldest pub in Willian founded in 1684. It was purchased by Pryors Brewery in Baldock who were partners with Truman Hanbury Morris Brewery in Shoreditch. When John Pryor died in 1852 the family could not continue running the business and sold the brewery and tied estate to Simpsons Brewery of Royston in 1853.

They continued to trade the pub well until eventually selling to Greene King in 1954. The pub continued to flourish, as it was one of only a few pubs that could sell alcohol in the Letchworth Garden City district, which had banned alcohol sales in 1903. 

The Three Horseshoes was allowed to sell alcohol because it was established before the Garden City and subsequently served the residents of Letchworth Garden City as well as the people of Willian.