GETTYSBURG, a borough and the county-seat of Adams county, Pennsylvania, U.S.A., about 35 m. S.W. of Harrisburg. Pop. (1900) 3495; (1910) 4030. It is served by the Western Maryland and the Gettysburg & Harrisburg railways. The site of the borough is a valley about 1½ m. wide; the neighbouring country abounds in attractive scenery. Katalysine Spring in the vicinity was once a well-known summer resort; its waters contain lithia in solution. Gettysburg has several small manufacturing establishments and is the seat of Pennsylvania College (opened in 1832, and the oldest Lutheran college in America), which had 312 students (68 in the preparatory department) in 1907-1908, and of a Lutheran theological seminary, opened in 1826 on Seminary Ridge; but the borough is best known as the scene of one of the most important battles of the Civil War. Very soon after the battle a soldiers' national cemetery was laid out here, in which the bodies of about 3600 Union soldiers have been buried; and at the dedication of this cemetery, in November 1863, President Lincoln delivered his celebrated "Gettysburg Address." In 1864 the Gettysburg Battle-Field Memorial Association was incorporated, and the work of this association resulted in the conversion of the battle-field into a National Park, an act for the purpose being passed by Congress in 1895. Within the park the lines of battle have been carefully marked, and about 600 monuments, 1000 markers, and 500 iron tablets have been erected by states and regimental associations. Hundreds of cannon have been mounted, and five observation towers have been built. From 1816 to 1840 Gettysburg was the home of Thaddeus Stevens. Gettysburg was settled about 1740, was laid out in 1787, was made the county-seat in 1800, and was incorporated as a borough in 1806.