sentences:  The Seligman Commercial Historic District protects the historical central area's early 20th century commercial buildings along Historic Route 66, a revived popular tourist destination.Historic district contributing properties include the Pitts General Merchandise Store and the U.S. Post Office from 1903, the Pioneer Hall and Theatre and the Seligman Garage from 1905, and the Seligman Pool Hall from 1923.In 1987 Seligman gained its name "Birthplace of Historic Route 66" due to the efforts of Seligman residents, who convinced the State of Arizona to dedicate Route 66 a historic highway.