The Bost Building, also known as Columbia Hotel, is located on East Eighth Avenue (PA 837) in Homestead, Pennsylvania, United States. Built just before the 1892 Homestead Strike, it was used as headquarters by the Amalgamated Association of Iron and Steel Workers and for reporters covering the confrontation. It is the only significant building associated with the strike that remains intact. It is a contributing property to the Homestead Historic District. It was declared a National Historic Landmark in 1999.