Martin Tower was a 21-story, 101.2 m (332 ft) building at 1170 8th Avenue in Bethlehem, Pennsylvania, United States. It was the tallest building in both Bethlehem and the greater Lehigh Valley, 8 ft (2.4 m) taller than the PPL Building in Allentown. Martin Tower was placed on the National Register of Historic Places on June 28, 2010. Originally built as the headquarters of now-defunct Bethlehem Steel, the building, which once dominated Bethlehem's city's skyline, was completed in 1972. It stood vacant from early 2007 until its eventual demolition on May 19, 2019.