A popular national monument near Savannah is Fort Pulaski. Situated in Georgia between the Tybee Island and Savannah, the monument encompasses most of the Cockspur Island and all of McQueens Island. Most notably, the initial fort is known as being the location at which the Union Army successful tested the rifled cannon. This event took place during the American Civil War in 1862. The cannon proved its penetrating capabilities against rendered brick fortifications, making the structure officially obsolete. Overall, the fort was mainly home to a prisoner-or-war camp. In 1833, a new fort began construction on Cockspur Island near the mouth of the Savannah River. The fort's primary function was to protect the United States against foreign invasions. Its name, Fort Pulaski, came from Kazimierz Pulaski, a Polish soldier who fought under George Washington during the American Revolution. The fort was completed in 1847 with a $1.000.000 price tag. During the 20th Century, the fort began to fall apart. On Oct. 15, 1924, it was officially declared a national monument by proclamation of President Calvin Coolidge. Several years later, the war department handed the park over to the National Park Service in 1933 so that repairs on the facility could begin. Today, the Fort Pulaski National Monument is open to the public. It is listed on the National Register of Historic Places as of Oct. 15, 1966. Visitors can enjoy a 17-minute film, "The Battle for Fort Pulaski" shown on demand in the visitor center. Other museum exhibits display the history and significance of the fort. There is also a bookstore situated in the center. Additionally the park features daily lectures and demonstrations hosted by Rangers during the summer months and on weekends year-round.