海德堡城堡位于德国的南部，是现今德国著名的城堡废墟和海德堡里程碑式建筑，城堡废墟是阿尔卑斯山以北最著名的文艺复兴建筑。自17和18世纪遭到损坏后，城堡现已部分重建。城堡位于80米高的王座山山坡北部，从而俯视旧城区。最早的城堡建筑在1240年前已建成，1294年扩展成两个城堡。然而在1537年闪电摧毁了上层建筑，现今城堡的样式源于1650年的扩建和重修，之后因战争和火灾遭到损坏。1764年的另一次雷击摧毁了部分重修部分。

Heidelberg Castle (German:Heidelberger Schloss) is a ruin in Germany and landmark of Heidelberg. The castle ruins are among the most important Renaissance structures north of the Alps.

The castle has only been partially rebuilt since its demolition in the 17th and 18th centuries. It is located 80 metres (260 ft) up the northern part of the Königstuhl hillside, and thereby dominates the view of the old downtown. It is served by an intermediate station on the Heidelberger Bergbahn funicular railway that runs from Heidelberg's Kornmarkt to the summit of the Königstuhl.