Castle Berg, Manor house in Berg, Bavaria, Germany

Schloss Berg is a manor house on the east bank of Lake Starnberg in the municipality of Berg, Upper Bavaria. It began in 1640 as an Italian-style villa for Hans Georg von Hörwarth; after Eduard Riedel's 1849–1851 Neo-Gothic redesign it had four crenellated corner towers, and Ludwig II added a fifth, tall north tower he called "Isolde". The corner towers, crenellations and Neo-Gothic facade stucco were removed in the 1949–1951 renovation, which restored the plain exterior with painted Baroque window surrounds.

Hans Georg von Hörwarth built the manor in 1640 as an Italian-style villa on the site of an older house. In 1676 Elector Ferdinand Maria acquired it from the Hörwarth family and used it as a hunting lodge. Between 1849 and 1851 Eduard Riedel remodelled it in Neo-Gothic style with four towers and crenellations for Maximilian II, and Ludwig II added a fifth tower, called Isolde.

Ludwig II moved his court to Berg every 11 May and governed from there via a telegraph line to Munich. In 1868 he lent the palace to Russian empress Maria Alexandrovna and held a festival for her with lanterns throughout the park and fireworks. The chapel he built in 1876 was left untouched in later renovations.

The house is not open to visitors: it serves as the summer residence of Franz, Duke of Bavaria, head of the House of Wittelsbach. Only in July 2022, during the town's 1200th anniversary, did 50 citizens of Berg receive a short tour. The lakeside park and the memorial cross in the shallow water near Berg can be viewed from outside.

The castle is deeply marked by a pivotal moment in Bavarian history: King Ludwig II spent his final days here before his death in the lake in 1886. A memorial cross in the water remains visible from the shore, serving as a quiet reminder of that tragic event.