In 1817, the Philadelphia-Pittsburgh Turnpike was completed, a gravel road that was the precursor to today's US Route 30. Fort Ligonier was a logical place for travelers to break their journey, and with such commercial opportunities in mind, a local resident named John Ramsay (sometimes spelled Ramsey) laid out the street plan, including the space now known as the Diamond. He initially called the town Ramseytown, later changed to Wellington (after the Duke of Wellington), and finally the name was changed to Ligonier. Several decades of prosperity followed. On April 10, 1834, Ligonier was incorporated as a borough.